Bump bleach from 3.1.0 to 3.1.1

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]

requirements-3.txt

@@ -1,7 +1,7 @@
 appdirs==1.4.3
 args==0.1.0
 arrow==0.15.2
-bleach==3.1.0
+bleach==3.1.1
 certifi==2019.9.11
 chardet==3.0.4
 clint==0.5.1