Bump proptest from 0.9.5 to 0.9.6

Bumps [proptest](https://github.com/altsysrq/proptest) from 0.9.5 to 0.9.6.
- [Release notes](https://github.com/altsysrq/proptest/releases)
- [Changelog](https://github.com/AltSysrq/proptest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/altsysrq/proptest/compare/0.9.5...0.9.6)

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

Cargo.lock

@@ -1084,9 +1084,9 @@ dependencies = [
 
 [[package]]
 name = "proptest"
-version = "0.9.5"
+version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf6147d103a7c9d7598f4105cf049b15c99e2ecd93179bf024f0fd349be5ada4"
+checksum = "01c477819b845fe023d33583ebf10c9f62518c8d79a0960ba5c36d6ac8a55a5b"
 dependencies = [
  "bit-set",
  "bitflags",