Do some maintenance
- Remove I18n php shim
- Remove check for hooks in MW 1.20 and earlier
- Remove dead code for versions of MW 1.22 and earlier
- Extend author's array
- Bump version
Note: This is breaking for MW 1.22.x and earlier.
Bug:T168353
Change-Id: I7245331368edf261b15d98bd070a4a44e9c9d879