Bump bleach from 3.1.0 to 3.1.4 in /fast-elm

Bumps [bleach](https://github.com/mozilla/bleach) from 3.1.0 to 3.1.4.
- [Release notes](https://github.com/mozilla/bleach/releases)
- [Changelog](https://github.com/mozilla/bleach/blob/master/CHANGES)
- [Commits](mozilla/bleach@v3.1.0...v3.1.4)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

fast-elm/fmrequire.txt

@@ -12,7 +12,7 @@ backcall==0.1.0
 bcrypt==3.1.7
 beautifulsoup4==4.7.1
 billiard==3.6.2.0
-bleach==3.1.0
+bleach==3.1.4
 boto==2.49.0
 boto3==1.10.38
 botocore==1.13.39