Merge #383

Merge #383

383: Bump failure from 0.1.3 to 0.1.4 r=DJMcNab a=dependabot[bot]

Bumps [failure](https://github.com/rust-lang-nursery/failure) from 0.1.3 to 0.1.4.
<details>
<summary>Changelog</summary>

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

> # Version 0.1.4
>
> - Improved error reporting of the derive feature
> - Resolved a potential internal ambiguity when using the backtrace feature
>   that prevented backtrace from improving an upstream API.
> - Changed the bounds on std error compat conversions through the From trait
>   to take Sync and Send into account.
</details>
<details>
<summary>Commits</summary>

- [`70b98e6`](https://github.com/rust-lang-nursery/failure/commit/70b98e653adbb16bc15d6b399db4ce952093dc65) 0.1.4
- [`937fb70`](https://github.com/rust-lang-nursery/failure/commit/937fb704a4f88362c41bafa3da612e5e1fc12d7b) Add Sync and Send as failure::Error supports them. ([#283](https://github-redirect.dependabot.com/rust-lang-nursery/failure/issues/283))
- [`15b6798`](https://github.com/rust-lang-nursery/failure/commit/15b6798695b2d4a1ed7d46d9f59ad910f473126e) Improving procmacro error reporting
- [`22bfd31`](https://github.com/rust-lang-nursery/failure/commit/22bfd319a645df0e30a6e6da16757f153870e118) support trailing commas in macros ([#273](https://github-redirect.dependabot.com/rust-lang-nursery/failure/issues/273))
- [`26fc6eb`](https://github.com/rust-lang-nursery/failure/commit/26fc6eb71373da6cd21a18b6a06bd7ee437299d4) Future proof debug formatting.  Fixes [#279](https://github-redirect.dependabot.com/rust-lang-nursery/failure/issues/279)
- [`0f89723`](https://github.com/rust-lang-nursery/failure/commit/0f89723f1eaf3195acdb32c331e697f0b5299b0e) Reformat for latest rustfmt
- [`8f8f92f`](https://github.com/rust-lang-nursery/failure/commit/8f8f92fa55e99d95a886cf54ad877f47059c7375) Update metadata to point to new docs
- See full diff in [compare view](https://github.com/rust-lang-nursery/failure/compare/0.1.3...0.1.4)
</details>
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