build(deps): bump log from 0.4.20 to 0.4.21 (#1203)

Bumps [log](https://github.com/rust-lang/log) from 0.4.20 to 0.4.21.
- [Release notes](https://github.com/rust-lang/log/releases)
- [Changelog](https://github.com/rust-lang/log/blob/master/CHANGELOG.md)
- [Commits](rust-lang/log@0.4.20...0.4.21)

---
updated-dependencies:
- dependency-name: log
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -285,7 +285,7 @@ hex                   = { version = "0.4.3", default-features = false }
 hex-literal           = { version = "0.4.1" }
 impl-trait-for-tuples = { version = "0.2.2" }
 jsonrpsee             = { version = "0.16.3" }
-log                   = { version = "0.4.20", default-features = false }
+log                   = { version = "0.4.21", default-features = false }
 num-bigint            = { version = "0.4.3", default-features = false }
 num-traits            = { version = "0.2.18", default-features = false }
 parity-scale-codec    = { version = "3.6.5", default-features = false }