Bump loofah from 2.2.3 to 2.3.1 (#2728)
Bump loofah from 2.2.3 to 2.3.1 (#2728)

Bump loofah from 2.2.3 to 2.3.1Bumps [loofah](https://github.com/flavorjones/loofah) from 2.2.3 to 2.3.1.
<details>
<summary>Release notes</summary>

*Sourced from [loofah's releases](https://github.com/flavorjones/loofah/releases).*

> ## 2.3.1 / 2019-10-22
> 
> ### Security
> 
> Address CVE-2019-15587: Unsanitized JavaScript may occur in sanitized output when a crafted SVG element is republished.
> 
> This CVE's public notice is at [flavorjones/loofah#171](https://github-redirect.dependabot.com/flavorjones/loofah/issues/171)
> 
> ## 2.3.0 / 2019-09-28
> 
> ### Features
> 
> * Expand set of allowed protocols to include `tel:` and `line:`. [#104, [#147](https://github-redirect.dependabot.com/flavorjones/loofah/issues/147)]
> * Expand set of allowed CSS functions. [related to [#122](https://github-redirect.dependabot.com/flavorjones/loofah/issues/122)]
> * Allow greater precision in shorthand CSS values. [#149](https://github-redirect.dependabot.com/flavorjones/loofah/issues/149) (Thanks, [@&#8203;danfstucky](https://github.com/danfstucky)!)
> * Allow CSS property `list-style` [#162](https://github-redirect.dependabot.com/flavorjones/loofah/issues/162) (Thanks, [@&#8203;jaredbeck](https://github.com/jaredbeck)!)
> * Allow CSS keywords `thick` and `thin` [#168](https://github-redirect.dependabot.com/flavorjones/loofah/issues/168) (Thanks, [@&#8203;georgeclaghorn](https://github.com/georgeclaghorn)!)
> * Allow HTML property `contenteditable` [#167](https://github-redirect.dependabot.com/flavorjones/loofah/issues/167) (Thanks, [@&#8203;andreynering](https://github.com/andreynering)!)
> 
> 
> ### Bug fixes
> 
> * CSS hex values are no longer limited to lowercase hex. Previously uppercase hex were scrubbed. [#165](https://github-redirect.dependabot.com/flavorjones/loofah/issues/165) (Thanks, [@&#8203;asok](https://github.com/asok)!)
> 
> 
> ### Deprecations / Name Changes
> 
> The following method and constants are hereby deprecated, and will be completely removed in a future release:
> 
> * Deprecate `Loofah::Helpers::ActionView.white_list_sanitizer`, please use `Loofah::Helpers::ActionView.safe_list_sanitizer` instead.
> * Deprecate `Loofah::Helpers::ActionView::WhiteListSanitizer`, please use `Loofah::Helpers::ActionView::SafeListSanitizer` instead.
> * Deprecate `Loofah::HTML5::WhiteList`, please use `Loofah::HTML5::SafeList` instead.
> 
> Thanks to [@&#8203;JuanitoFatas](https://github.com/JuanitoFatas) for submitting these changes in [#164](https://github-redirect.dependabot.com/flavorjones/loofah/issues/164) and for making the language used in Loofah more inclusive.
> 
> 
</details>
<details>
<summary>Changelog</summary>

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

> ## 2.3.1 / 2019-10-22
> 
> ### Security
> 
> Address CVE-2019-15587: Unsanitized JavaScript may occur in sanitized output when a crafted SVG element is republished.
> 
> This CVE's public notice is at [flavorjones/loofah#171](https://github-redirect.dependabot.com/flavorjones/loofah/issues/171)
> 
> 
> ## 2.3.0 / 2019-09-28
> 
> ### Features
> 
> * Expand set of allowed protocols to include `tel:` and `line:`. [#104, [#147](https://github-redirect.dependabot.com/flavorjones/loofah/issues/147)]
> * Expand set of allowed CSS functions. [related to [#122](https://github-redirect.dependabot.com/flavorjones/loofah/issues/122)]
> * Allow greater precision in shorthand CSS values. [#149](https://github-redirect.dependabot.com/flavorjones/loofah/issues/149) (Thanks, [@&#8203;danfstucky](https://github.com/danfstucky)!)
> * Allow CSS property `list-style` [#162](https://github-redirect.dependabot.com/flavorjones/loofah/issues/162) (Thanks, [@&#8203;jaredbeck](https://github.com/jaredbeck)!)
> * Allow CSS keywords `thick` and `thin` [#168](https://github-redirect.dependabot.com/flavorjones/loofah/issues/168) (Thanks, [@&#8203;georgeclaghorn](https://github.com/georgeclaghorn)!)
> * Allow HTML property `contenteditable` [#167](https://github-redirect.dependabot.com/flavorjones/loofah/issues/167) (Thanks, [@&#8203;andreynering](https://github.com/andreynering)!)
> 
> 
> ### Bug fixes
> 
> * CSS hex values are no longer limited to lowercase hex. Previously uppercase hex were scrubbed. [#165](https://github-redirect.dependabot.com/flavorjones/loofah/issues/165) (Thanks, [@&#8203;asok](https://github.com/asok)!)
> 
> 
> ### Deprecations / Name Changes
> 
> The following method and constants are hereby deprecated, and will be completely removed in a future release:
> 
> * Deprecate `Loofah::Helpers::ActionView.white_list_sanitizer`, please use `Loofah::Helpers::ActionView.safe_list_sanitizer` instead.
> * Deprecate `Loofah::Helpers::ActionView::WhiteListSanitizer`, please use `Loofah::Helpers::ActionView::SafeListSanitizer` instead.
> * Deprecate `Loofah::HTML5::WhiteList`, please use `Loofah::HTML5::SafeList` instead.
> 
> Thanks to [@&#8203;JuanitoFatas](https://github.com/JuanitoFatas) for submitting these changes in [#164](https://github-redirect.dependabot.com/flavorjones/loofah/issues/164) and for making the language used in Loofah more inclusive.
</details>
<details>
<summary>Commits</summary>

- [`83df303`](https://github.com/flavorjones/loofah/commit/83df303aa14d58f76349b59e6917ae61ce011a83) version bump to v2.3.1
- [`e323a77`](https://github.com/flavorjones/loofah/commit/e323a776dd2755a837a67895eaa3cdae44495254) Merge pull request [#172](https://github-redirect.dependabot.com/flavorjones/loofah/issues/172) from flavorjones/171-xss-vulnerability
- [`1d81f91`](https://github.com/flavorjones/loofah/commit/1d81f919bd29458a3b80966f9b6870b74b839dc9) update CHANGELOG
- [`0c6617a`](https://github.com/flavorjones/loofah/commit/0c6617af440879ce97440f6eb6c58636456dc8ec) mitigate XSS vulnerability in SVG animate attributes
- [`a5bd819`](https://github.com/flavorjones/loofah/commit/a5bd819f3ef13d5d4595106557c26169df2ef3a0) rufo formatting
- [`1bdf276`](https://github.com/flavorjones/loofah/commit/1bdf27600cf2433eb71fa542cce210663d8abef8) formatting in README
- [`1908dc2`](https://github.com/flavorjones/loofah/commit/1908dc2defba6049bc17519c8b128d7030915204) update CHANGELOG with release date
- [`bcbd7b3`](https://github.com/flavorjones/loofah/commit/bcbd7b373176db3b4b2b249caaf196b625779c1b) update dev gemspec
- [`f6d4c2d`](https://github.com/flavorjones/loofah/commit/f6d4c2d1b094e33848ed454f4a69f3c12cd44084) version bump to v2.3.0
- [`08fee8c`](https://github.com/flavorjones/loofah/commit/08fee8c85fb9e1c5a910491c1f5a8f8926a0600d) update dev deps
- Additional commits viewable in [compare view](https://github.com/flavorjones/loofah/compare/v2.2.3...v2.3.1)
</details>
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