fix(deps): update rust crate chrono to 0.4.38

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
chrono	dependencies	patch	0.4.37 -> 0.4.38

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Release Notes

chronotope/chrono (chrono)

### [`v0.4.38`](https://togithub.com/chronotope/chrono/releases/tag/v0.4.38) [Compare Source](https://togithub.com/chronotope/chrono/compare/v0.4.37...v0.4.38) This release bring a ca. 20% improvement to the performance of the formatting code, and a convenient `days_since` method for the `Weekday` type. Chrono 0.4.38 also removes the long deprecated `rustc-serialize` feature. Support for `rustc-serialize` will be [soft-destabilized in the next Rust edition](https://togithub.com/rust-lang/rust/pull/116016). Removing the feature will not break existing users of the feature; Cargo will just not update dependents that rely on it to newer versions of chrono. In chrono 0.4.36 we made an accidental breaking change by switching to `derive(Copy)` for `DateTime` instead of a manual implementation. It is reverted in this release. ##### Removals - Remove `rustc-serialize` feature ([#​1548](https://togithub.com/chronotope/chrono/issues/1548), thanks [@​workingjubilee](https://togithub.com/workingjubilee)) ##### Additions - Add `Weekday::days_since` ([#​1249](https://togithub.com/chronotope/chrono/issues/1249), based on [#​216](https://togithub.com/chronotope/chrono/issues/216) by [@​clarfonthey](https://togithub.com/clarfonthey)) - Add `TimeDelta::checked_mul` and `TimeDelta::checked_div` ([#​1565](https://togithub.com/chronotope/chrono/issues/1565), thanks [@​Zomtir](https://togithub.com/Zomtir)) ##### Fixes - Return error when rounding with a zero duration ([#​1474](https://togithub.com/chronotope/chrono/issues/1474), thanks [@​Dav1dde](https://togithub.com/Dav1dde)) - Manually implement `Copy` for `DateTime` if offset is `Copy` ([#​1573](https://togithub.com/chronotope/chrono/issues/1573)) ##### Internal - Inline `test_encodable_json` and `test_decodable_json` functions ([#​1550](https://togithub.com/chronotope/chrono/issues/1550)) - CI: Reduce combinations in `cargo hack check` ([#​1553](https://togithub.com/chronotope/chrono/issues/1553)) - Refactor formatting code ([#​1335](https://togithub.com/chronotope/chrono/issues/1335)) - Optimize number formatting ([#​1558](https://togithub.com/chronotope/chrono/issues/1558)) - Only package files needed for building and testing ([#​1554](https://togithub.com/chronotope/chrono/issues/1554)) Thanks to all contributors on behalf of the chrono team, [@​djc](https://togithub.com/djc) and [@​pitdicker](https://togithub.com/pitdicker)!

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