Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  42bbc0fba12fb25b3bd18c9766ca076ccb09c9b2

Cleanup ApiParsoidUtilsFlow

* Use API to enforce 'to' and 'from' parameters are either
  "html" or "wikitext"
* Remove useless help url and deprecated version indicator

Change-Id: I289db6099a6ea1219cdb40c94a96c52d787a46fe