bug 1442745 upgrade bleach to 2.1.3
bug 1442745 upgrade bleach to 2.1.3

Upgrade bleach to 2.1.3 to fix a security issue escaping URIs
containing html entities affecting bleach 2.1 to 2.1.2. On mozillians
this is mitigated by CSP.

akatsoulas/mozillians,mozilla/mozillians,akatsoulas/mozillians,mozilla/mozillians,mozilla/mozillians,johngian/mozillians,johngian/mozillians,akatsoulas/mozillians,akatsoulas/mozillians,mozilla/mozillians,johngian/mozillians,johngian/mozillians