diff --git a/Cargo.lock b/Cargo.lock
index 51e72d20..e5388188 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -9,17 +9,17 @@ dependencies = [
  "canonical-path 2.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "generational-arena 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generational-arena 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "gumdrop 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "secrecy 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "signal-hook 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "termcolor 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termcolor 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "wait-timeout 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -42,7 +42,7 @@ name = "aho-corasick"
 version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -73,9 +73,14 @@ name = "autocfg"
 version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "autocfg"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "backtrace"
-version = "0.3.40"
+version = "0.3.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -89,7 +94,7 @@ name = "backtrace-sys"
 version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.48 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -113,12 +118,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "blake2b_simd"
-version = "0.5.9"
+version = "0.5.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "constant_time_eq 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "constant_time_eq 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -178,7 +183,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cc"
-version = "1.0.48"
+version = "1.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -191,8 +196,8 @@ name = "chrono"
 version = "0.4.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -207,7 +212,7 @@ dependencies = [
 
 [[package]]
 name = "constant_time_eq"
-version = "0.1.4"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -255,7 +260,7 @@ name = "failure"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -264,9 +269,9 @@ name = "failure_derive"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -348,9 +353,9 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -374,7 +379,7 @@ dependencies = [
  "futures-macro 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-sink 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-task 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro-nested 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -383,7 +388,7 @@ dependencies = [
 
 [[package]]
 name = "generational-arena"
-version = "0.2.6"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -399,12 +404,12 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.1.13"
+version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -445,7 +450,7 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.3"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -580,7 +585,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "memchr"
-version = "2.2.1"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -634,19 +639,19 @@ dependencies = [
 
 [[package]]
 name = "num-integer"
-version = "0.1.41"
+version = "0.1.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.2.10"
+version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -654,7 +659,7 @@ name = "num_cpus"
 version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "hermit-abi 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hermit-abi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -684,14 +689,14 @@ name = "pin-project-internal"
 version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "pin-project-lite"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -709,9 +714,9 @@ name = "proc-macro-hack"
 version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -729,7 +734,7 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.6"
+version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -744,19 +749,19 @@ dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quick-error 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_chacha 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "rusty-fork 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "quick-error"
-version = "1.2.2"
+version = "1.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -772,7 +777,7 @@ name = "quote"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -795,10 +800,10 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.7.2"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -841,7 +846,7 @@ name = "rand_core"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -921,7 +926,7 @@ name = "redjubjub"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "blake2b_simd 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "blake2b_simd 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "jubjub 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -935,13 +940,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "regex"
-version = "1.3.1"
+version = "1.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aho-corasick 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -950,13 +955,13 @@ version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "utf8-ranges 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.12"
+version = "0.6.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -978,7 +983,7 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quick-error 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "wait-timeout 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1019,9 +1024,9 @@ name = "serde_derive"
 version = "1.0.104"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1093,10 +1098,10 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.11"
+version = "1.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1117,9 +1122,9 @@ name = "synstructure"
 version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1130,7 +1135,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
  "remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1138,10 +1143,10 @@ dependencies = [
 
 [[package]]
 name = "termcolor"
-version = "1.0.5"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "wincolor 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1157,14 +1162,14 @@ name = "thiserror-impl"
 version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "thread_local"
-version = "0.3.6"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1191,11 +1196,11 @@ dependencies = [
  "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio-uds 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "pin-project-lite 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-project-lite 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1208,7 +1213,7 @@ dependencies = [
  "futures-core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-sink 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "pin-project-lite 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-project-lite 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1223,24 +1228,24 @@ dependencies = [
 [[package]]
 name = "tower"
 version = "0.3.0"
-source = "git+https://github.com/tower-rs/tower#7b48479bd25fe8f1840ed8be1b25682449aa3927"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "futures-core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "tower-buffer 0.3.0 (git+https://github.com/tower-rs/tower)",
- "tower-discover 0.3.0 (git+https://github.com/tower-rs/tower)",
+ "tower-buffer 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tower-discover 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tower-layer 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tower-limit 0.3.0 (git+https://github.com/tower-rs/tower)",
- "tower-load-shed 0.3.0 (git+https://github.com/tower-rs/tower)",
- "tower-retry 0.3.0 (git+https://github.com/tower-rs/tower)",
+ "tower-limit 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tower-load-shed 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tower-retry 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tower-service 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tower-timeout 0.3.0 (git+https://github.com/tower-rs/tower)",
- "tower-util 0.3.0 (git+https://github.com/tower-rs/tower)",
+ "tower-timeout 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tower-util 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "tower-buffer"
 version = "0.3.0"
-source = "git+https://github.com/tower-rs/tower#7b48479bd25fe8f1840ed8be1b25682449aa3927"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "futures-core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-project 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1253,7 +1258,7 @@ dependencies = [
 [[package]]
 name = "tower-discover"
 version = "0.3.0"
-source = "git+https://github.com/tower-rs/tower#7b48479bd25fe8f1840ed8be1b25682449aa3927"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "futures-core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-project 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1268,7 +1273,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "tower-limit"
 version = "0.3.0"
-source = "git+https://github.com/tower-rs/tower#7b48479bd25fe8f1840ed8be1b25682449aa3927"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
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  "pin-project 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1280,20 +1285,20 @@ dependencies = [
 [[package]]
 name = "tower-load"
 version = "0.3.0"
-source = "git+https://github.com/tower-rs/tower#7b48479bd25fe8f1840ed8be1b25682449aa3927"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
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  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-project 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "tower-discover 0.3.0 (git+https://github.com/tower-rs/tower)",
+ "tower-discover 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tower-service 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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 version = "0.3.0"
-source = "git+https://github.com/tower-rs/tower#7b48479bd25fe8f1840ed8be1b25682449aa3927"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
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  "pin-project 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1304,7 +1309,7 @@ dependencies = [
 [[package]]
 name = "tower-retry"
 version = "0.3.0"
-source = "git+https://github.com/tower-rs/tower#7b48479bd25fe8f1840ed8be1b25682449aa3927"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
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  "pin-project 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1321,7 +1326,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "tower-timeout"
 version = "0.3.0"
-source = "git+https://github.com/tower-rs/tower#7b48479bd25fe8f1840ed8be1b25682449aa3927"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "pin-project 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1332,7 +1337,7 @@ dependencies = [
 [[package]]
 name = "tower-util"
 version = "0.3.0"
-source = "git+https://github.com/tower-rs/tower#7b48479bd25fe8f1840ed8be1b25682449aa3927"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "futures-core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-util 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1348,7 +1353,7 @@ dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "tracing-attributes 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "tracing-core 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tracing-core 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1357,12 +1362,12 @@ version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "tracing-core"
-version = "0.1.8"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1384,7 +1389,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "tracing-core 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tracing-core 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1397,9 +1402,9 @@ dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "matchers 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "owning_ref 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "tracing-core 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tracing-core 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "tracing-log 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1447,7 +1452,7 @@ dependencies = [
 
 [[package]]
 name = "wasi"
-version = "0.7.0"
+version = "0.9.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1476,7 +1481,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "winapi-util"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1487,15 +1492,6 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "wincolor"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "ws2_32-sys"
 version = "0.2.1"
@@ -1539,13 +1535,13 @@ dependencies = [
  "hex 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "indexmap 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pin-project 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "thiserror 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-util 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tower 0.3.0 (git+https://github.com/tower-rs/tower)",
- "tower-load 0.3.0 (git+https://github.com/tower-rs/tower)",
+ "tower 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tower-load 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tracing 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "tracing-futures 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "zebra-chain 0.1.0",
@@ -1574,11 +1570,11 @@ dependencies = [
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  "hyper 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
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- "tower 0.3.0 (git+https://github.com/tower-rs/tower)",
+ "tower 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
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  "tracing-log 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1601,12 +1597,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "0d382e583f07208808f6b1249e60848879ba3543f57c32277bf52d69c2f0f0ee"
 "checksum arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cff77d8686867eceff3105329d4698d96c2391c176d5d03adc90c7389162b5b8"
 "checksum autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
-"checksum backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)" = "924c76597f0d9ca25d762c25a4d369d51267536465dc5064bdf0eb073ed477ea"
+"checksum autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
+"checksum backtrace 0.3.42 (registry+https://github.com/rust-lang/crates.io-index)" = "b4b1549d804b6c73f4817df2ba073709e96e426f12987127c48e6745568c350b"
 "checksum backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)" = "5d6575f128516de27e3ce99689419835fce9643a9b215a14d2b5b685be018491"
 "checksum bit-set 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e84c238982c4b1e1ee668d136c510c67a13465279c0cb367ea6baf6310620a80"
 "checksum bit-vec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f59bbe95d4e52a6398ec21238d31577f2b28a9d86807f06ca59d191d8440d0bb"
 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
-"checksum blake2b_simd 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)" = "b83b7baab1e671718d78204225800d6b170e648188ac7dc992e9d6bddf87d0c0"
+"checksum blake2b_simd 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)" = "d8fb2d74254a3a0b5cac33ac9f8ed0e44aa50378d9dbb2e5d83bd21ed1dc2c8a"
 "checksum block-buffer 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c0940dc441f31689269e10ac70eb1002a3a1d3ad1390e030043662eb7fe4688b"
 "checksum block-padding 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "fa79dedbb091f449f1f39e53edf88d5dbe95f895dae6135a8d7b881fb5af73f5"
 "checksum bls12_381 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c8586926bfacc9d548769ecd480d31f35fc3158e9650637b514e98f13659a620"
@@ -1615,11 +1612,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum bytes 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "10004c15deb332055f7a4a208190aed362cf9a7c2f6ab70a305fba50e1105f38"
 "checksum c2-chacha 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "214238caa1bf3a496ec3392968969cab8549f96ff30652c9e56885329315f6bb"
 "checksum canonical-path 2.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e6e9e01327e6c86e92ec72b1c798d4a94810f147209bbe3ffab6a86954937a6f"
-"checksum cc 1.0.48 (registry+https://github.com/rust-lang/crates.io-index)" = "f52a465a666ca3d838ebbf08b241383421412fe7ebb463527bba275526d89f76"
+"checksum cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)" = "95e28fa049fda1c330bcf9d723be7663a899c4679724b34c81e9f5a326aab8cd"
 "checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 "checksum chrono 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "31850b4a4d6bae316f7a09e691c944c28299298837edc0a03f755618c23cbc01"
 "checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
-"checksum constant_time_eq 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "995a44c877f9212528ccc74b21a232f66ad69001e40ede5bcee2ac9ef2657120"
+"checksum constant_time_eq 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 "checksum darling 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fcfbcb0c5961907597a7d1148e3af036268f2b773886b8bb3eeb1e1281d3d3d6"
 "checksum darling_core 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6afc018370c3bff3eb51f89256a6bdb18b4fdcda72d577982a14954a7a0b402c"
 "checksum darling_macro 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c6d8dac1c6f1d29a41c4712b4400f878cb4fcc4c7628f298dd75038e024998d1"
@@ -1640,13 +1637,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum futures-sink 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "171be33efae63c2d59e6dbba34186fe0d6394fb378069a76dfd80fdcffd43c16"
 "checksum futures-task 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0bae52d6b29cf440e298856fec3965ee6fa71b06aa7495178615953fd669e5f9"
 "checksum futures-util 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c0d66274fb76985d3c62c886d1da7ac4c0903a8c9f754e8fe0f35a6a6cc39e76"
-"checksum generational-arena 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "675c9623fbcdb4b402176db720bf5d95883a36303703ed1bd3a03482382f735a"
+"checksum generational-arena 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "0e40d0cee2e2fb4fba18b55a27bf96faf49fa86d49f178695bd3bf4500b156b4"
 "checksum generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c68f0274ae0e023facc3c97b2e00f076be70e254bc851d972503b328db79b2ec"
-"checksum getrandom 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "e7db7ca94ed4cd01190ceee0d8a8052f08a247aa1b469a7f68c6a3b71afcf407"
+"checksum getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
 "checksum gumdrop 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a57b4113bb9af093a1cd0b505a44a93103e32e258296d01fa2def3f37c2c7cc"
 "checksum gumdrop_derive 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "dae5488e2c090f7586e2027e4ea6fcf8c9d83e2ef64d623993a33a0fb811f1f7"
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+"checksum winapi-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "4ccfbf554c6ad11084fb7517daca16cfdcaccbdadba4fc336f032a8b12c2ad80"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-"checksum wincolor 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "96f5016b18804d24db43cebf3c77269e7569b8954a8464501c216cc5e070eaa9"
 "checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
 "checksum zeroize 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)" = "45af6a010d13e4cf5b54c94ba5a2b2eba5596b9e46bf5875612d332a1f2b3f86"
diff --git a/zebrad/Cargo.toml b/zebrad/Cargo.toml
index 5458bee1..b1f37c77 100644
--- a/zebrad/Cargo.toml
+++ b/zebrad/Cargo.toml
@@ -25,7 +25,7 @@ tracing-log = "0.1"
 
 hyper = "0.13.1"
 
-tower = { git = "https://github.com/tower-rs/tower" }
+tower = "0.3"
 
 zebra-chain = { path = "../zebra-chain" }
 zebra-network = { path = "../zebra-network" }