Merge #614

614: Bump chrono from 0.4.9 to 0.4.10 r=tomtau a=dependabot-preview[bot]

Bumps [chrono](https://github.com/chronotope/chrono) from 0.4.9 to 0.4.10.
<details>
<summary>Changelog</summary>

*Sourced from [chrono's changelog](https://github.com/chronotope/chrono/blob/master/CHANGELOG.md).*

> ## 0.4.10
> 
> ### Improvements
> 
> * `DateTime::parse_from_str` is more than 2x faster in some cases. ([@&#8203;michalsrb](https://github.com/michalsrb)
>   [#358](https://github-redirect.dependabot.com/chronotope/chrono/issues/358))
> * Significant improvements to no-std and alloc support (This should also make
>   many format/serialization operations induce zero unnecessary allocations)
>   ([@&#8203;CryZe](https://github.com/CryZe) [#341](https://github-redirect.dependabot.com/chronotope/chrono/issues/341))
> 
> ### Features
> 
> * Functions that were accepting `Iterator` of `Item`s (for example
>   `format_with_items`) now accept `Iterator` of `Borrow<Item>`, so one can
>   use values or references. ([@&#8203;michalsrb](https://github.com/michalsrb) [#358](https://github-redirect.dependabot.com/chronotope/chrono/issues/358))
> * Add built-in support for structs with nested `Option<Datetime>` etc fields
>   ([@&#8203;manifest](https://github.com/manifest) [#302](https://github-redirect.dependabot.com/chronotope/chrono/issues/302))
> 
> ### Internal/doc improvements
> 
> * Use markdown footnotes on the `strftime` docs page ([@&#8203;qudlibetor](https://github.com/qudlibetor) [#359](https://github-redirect.dependabot.com/chronotope/chrono/issues/359))
> * Migrate from `try!` -> `?` (question mark) because it is now emitting
>   deprecation warnings and has been stable since rustc 1.13.0
> * Deny dead code
</details>
<details>
<summary>Commits</summary>

- [`5905935`](chronotope/chrono@5905935) Merge pull request [#361](https://github-redirect.dependabot.com/chronotope/chrono/issues/361) from quodlibetor/deny-dead-code
- [`41700d1`](chronotope/chrono@41700d1) Remove unused constant, deny(dead_code)
- [`5b4fc23`](chronotope/chrono@5b4fc23) Merge pull request [#360](https://github-redirect.dependabot.com/chronotope/chrono/issues/360) from quodlibetor/chrono-0_4_10
- [`288f1dd`](chronotope/chrono@288f1dd) Merge pull request [#356](https://github-redirect.dependabot.com/chronotope/chrono/issues/356) from quodlibetor/num_days_from_epoch-docs
- [`670561b`](chronotope/chrono@670561b) Prepare for and Bump Chrono version to 0.4.10
- [`6622bdc`](chronotope/chrono@6622bdc) Replace all uses of `try!` with question mark
- [`46f8267`](chronotope/chrono@46f8267) Merge pull request [#358](https://github-redirect.dependabot.com/chronotope/chrono/issues/358) from michalsrb/optimize-parsing
- [`b717e04`](chronotope/chrono@b717e04) Handle some semantic merge conflicts
- [`27f5e5e`](chronotope/chrono@27f5e5e) Temporarily globally allow deprecated
- [`0b8c248`](chronotope/chrono@0b8c248) Fix build with rust 1.13.0
- Additional commits viewable in [compare view](chronotope/chrono@v0.4.9...v0.4.10)
</details>
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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>