Bump bleach from 3.1.0 to 3.1.4 in /Label_Microservice (kubeflow#120)

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]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Label_Microservice/requirements.txt

@@ -5,7 +5,7 @@ atomicwrites==1.3.0
 attrs==19.1.0
 backcall==0.1.0
 beautifulsoup4==4.8.0
-bleach==3.1.0
+bleach==3.1.4
 blis==0.2.4
 boto3==1.9.199
 botocore==1.12.199