Bump bleach from 3.1.0 to 3.1.1 in /anon1

Bumps [bleach](https://github.com/mozilla/bleach) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/mozilla/bleach/releases)
- [Changelog](https://github.com/mozilla/bleach/blob/master/CHANGES)
- [Commits](mozilla/bleach@v3.1.0...v3.1.1)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

anon1/requirements.txt

@@ -5,7 +5,7 @@ autopep8==1.4.4
 Babel==2.8.0
 backcall==0.1.0
 beautifulsoup4==4.8.2
-bleach==3.1.0
+bleach==3.1.1
 bs4==0.0.1
 certifi==2019.11.28
 chardet==3.0.4