Merge #143

143: Update hashbrown requirement from 0.4.0 to 0.5.0 r=torkleyy a=dependabot-preview[bot]

Updates the requirements on [hashbrown](https://github.com/rust-lang/hashbrown) to permit the latest version.
<details>
<summary>Changelog</summary>

*Sourced from [hashbrown's changelog](https://github.com/rust-lang/hashbrown/blob/master/CHANGELOG.md).*

> ## [v0.5.0] - 2019-06-12
> 
> ### Fixed
> - Resize with a more conservative amount of space after deletions. ([#86](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/86))
> 
> ### Changed
> - Exposed the Layout of the failed allocation in CollectionAllocErr::AllocErr. ([#89](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/89))
> 
> ## [v0.4.0] - 2019-05-30
> 
> ### Fixed
> - Fixed `Send` trait bounds on `IterMut` not matching the libstd one. ([#82](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/82))
> 
> ## [v0.3.1] - 2019-05-30
> 
> ### Fixed
> - Fixed incorrect use of slice in unsafe code. ([#80](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/80))
> 
> ## [v0.3.0] - 2019-04-23
> 
> ### Changed
> - Changed shrink_to to not panic if min_capacity < capacity. ([#67](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/67))
> 
> ### Fixed
> - Worked around emscripten bug emscripten-core/emscripten-fastcomp#258. ([#66](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/66))
> 
> ## [v0.2.2] - 2019-04-16
> 
> ### Fixed
> - Inlined non-nightly lowest_set_bit_nonzero. ([#64](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/64))
> - Fixed build on latest nightly. ([#65](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/65))
> 
> ## [v0.2.1] - 2019-04-14
> 
> ### Changed
> - Use for_each in map Extend and FromIterator. ([#58](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/58))
> - Improved worst-case performance of HashSet.is_subset. ([#61](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/61))
> 
> ### Fixed
> - Removed incorrect debug_assert. ([#60](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/60))
> 
> ## [v0.2.0] - 2019-03-31
> 
> ### Changed
> - The code has been updated to Rust 2018 edition. This means that the minimum
>   Rust version has been bumped to 1.31 (2018 edition).
> 
> ### Added
> - Added `insert_with_hasher` to the raw_entry API to allow `K: !(Hash + Eq)`. ([#54](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/54))
> - Added support for using hashbrown as the hash table implementation in libstd. ([#46](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/46))
></tr></table> ... (truncated)
</details>
<details>
<summary>Commits</summary>

- [`e7cd4a5`](rust-lang/hashbrown@e7cd4a5) Version 0.5.0
- [`2c16341`](rust-lang/hashbrown@2c16341) Auto merge of [#89](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/89) - SimonSapin:layout, r=Amanieu
- [`c2e26e7`](rust-lang/hashbrown@c2e26e7) Expose the Layout of the failed allocation in CollectionAllocErr::AllocErr
- [`14bb115`](rust-lang/hashbrown@14bb115) Auto merge of [#87](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/87) - josephrocca:patch-1, r=Amanieu
- [`80dc544`](rust-lang/hashbrown@80dc544) Add simple usage code
- [`b240ee0`](rust-lang/hashbrown@b240ee0) Auto merge of [#86](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/86) - edre:rehash, r=Amanieu
- [`afc20d7`](rust-lang/hashbrown@afc20d7) Resize with a more conservative amount of space when inserting after deletions.
- [`119f429`](rust-lang/hashbrown@119f429) Auto merge of [#84](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/84) - edre:bench, r=Amanieu
- [`8783490`](rust-lang/hashbrown@8783490) Update insert_erase benchmark to keep the table size constant.
- [`143609d`](rust-lang/hashbrown@143609d) Auto merge of [#83](https://github-redirect.dependabot.com/rust-lang/hashbrown/issues/83) - edre:bench, r=Amanieu
- Additional commits viewable in [compare view](rust-lang/hashbrown@v0.4.0...v0.5.0)
</details>
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Cargo.toml

@@ -20,7 +20,7 @@ travis-ci = { repository = "torkleyy/shred" }
 
 [dependencies]
 arrayvec = "0.4"
-hashbrown = "0.4.0"
+hashbrown = "0.5.0"
 mopa = "0.2"
 rayon = { version = "1.0", optional = true }
 smallvec = "0.6"