build(deps): bump chrono from 0.4.19 to 0.4.20

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.19 to 0.4.20.
- [Release notes](https://github.com/chronotope/chrono/releases)
- [Changelog](https://github.com/chronotope/chrono/blob/main/CHANGELOG.md)
- [Commits](https://github.com/chronotope/chrono/compare/v0.4.19...v0.4.20)

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

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

Cargo.lock

@@ -399,12 +399,11 @@ checksum = "fd16c4719339c4530435d38e511904438d07cce7950afa3718a84ac36c10e89e"
 
 [[package]]
 name = "chrono"
-version = "0.4.19"
+version = "0.4.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "670ad68c9088c2a963aaa298cb369688cf3f9465ce5e2d4ca10e6e0098a1ce73"
+checksum = "6127248204b9aba09a362f6c930ef6a78f2c1b2215f8a7b398c06e1083f17af0"
 dependencies = [
  "js-sys",
- "libc",
  "num-integer",
  "num-traits",
  "time",