Upgrade bleach to 1.2.2

It's hard to tell but the change is two-fold, I upgraded html5lib to 0.95 and upgraded the submodule to https://github.com/jsocol/bleach/tree/v1.2.2 which is https://github.com/jsocol/bleach/commit/baf1eac5883ee321db8cb0f254e3fb0c3e9ba9ea

I have tested this out in playdoh but can't submit a pull request to that until after this has landed.