Bump chrono from 0.4.20 to 0.4.21

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.20 to 0.4.21.
- [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/v0.4.20...v0.4.21)

---
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

@@ -102,6 +102,15 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "android_system_properties"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7ed72e1635e121ca3e79420540282af22da58be50de153d36f81ddc6b83aa9e"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "async-trait"
 version = "0.1.57"
@@ -256,10 +265,11 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chrono"
-version = "0.4.20"
+version = "0.4.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6127248204b9aba09a362f6c930ef6a78f2c1b2215f8a7b398c06e1083f17af0"
+checksum = "3f725f340c3854e3cb3ab736dc21f0cca183303acea3b3ffec30f141503ac8eb"
 dependencies = [
+ "iana-time-zone",
  "js-sys",
  "num-integer",
  "num-traits",
@@ -1090,6 +1100,19 @@ dependencies = [
  "tokio-native-tls",
 ]
 
+[[package]]
+name = "iana-time-zone"
+version = "0.1.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1779539f58004e5dba1c1f093d44325ebeb244bfc04b791acdc0aaeca9c04570"
+dependencies = [
+ "android_system_properties",
+ "core-foundation",
+ "js-sys",
+ "wasm-bindgen",
+ "winapi",
+]
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"