Bump chrono from 0.4.15 to 0.4.18

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.15 to 0.4.18.
- [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/v0.4.15...v0.4.18)

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

Cargo.lock

@@ -161,13 +161,15 @@ checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
 [[package]]
 name = "chrono"
-version = "0.4.15"
+version = "0.4.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "942f72db697d8767c22d46a598e01f2d3b475501ea43d0db4f16d90259182d0b"
+checksum = "d021fddb7bd3e734370acfa4a83f34095571d8570c039f1420d77540f68d5772"
 dependencies = [
+ "libc",
  "num-integer",
  "num-traits",
  "time",
+ "winapi",
 ]
 
 [[package]]