Fixes release date

Merge pull request apostrophecms#419 from apostrophecms/v2

V2

Replaces another usage of includes (apostrophecms#404)

1.22.0: htmlparser2 4.x fixes longstanding bugs

1.21.1: fixed packaging issue that broke 1.21.0. thanks to Dmitry Sha…

…drunov.

1.21.0: new disallowedTagsMode feature, thanks to Yehonatan Zecharia

1.20.0: use files key to reduce size of npm package, thanks to Steven

1.19.3: reverted to `postcss` due to a [reported issue with `css-tree…

…` that might or might not have XSS implications](apostrophecms#269).

1.19.2:

* Switched out the heavy `postcss` dependency for the lightweight `css-tree` module. No API changes. Thanks to Justin Braithwaite.
* Various doc updates. Thanks to Pulkit Aggarwal and Cody Robertson.

removed dependency on character-entities which I briefly introduced (…

…never published)