Bump chrono from 0.4.12 to 0.4.13

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.12 to 0.4.13.
- [Release notes](https://github.com/chronotope/chrono/releases)
- [Changelog](https://github.com/chronotope/chrono/blob/master/CHANGELOG.md)
- [Commits](https://github.com/chronotope/chrono/compare/v0.4.12...v0.4.13)

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.lock

@@ -257,9 +257,9 @@ checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
 [[package]]
 name = "chrono"
-version = "0.4.12"
+version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0fee792e164f78f5fe0c296cc2eb3688a2ca2b70cdff33040922d298203f0c4"
+checksum = "c74d84029116787153e02106bf53e66828452a4b325cc8652b788b5967c0a0b6"
 dependencies = [
  "num-integer",
  "num-traits",

zebra-consensus/Cargo.toml

@@ -10,7 +10,7 @@ edition = "2018"
 [dependencies]
 zebra-chain = { path = "../zebra-chain" }
 zebra-state = { path = "../zebra-state" }
-chrono = "0.4.12"
+chrono = "0.4.13"
 futures-util = "0.3.5"
 tower = "0.3.1"