Release date: 2021-07-26
[x] Solve subtasks
[x] Update test instances
[x] Test - Report:
[ ] Package
[ ] Write release notes
[ ] Update extension pages on mediawiki.org (minimum supported MediaWiki version, anything else that is outdated)
[ ] Announce
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# Important notes
1. Minimum supported MediaWiki version is now 1.35 or above
## Translate
1. Removed hook - `TranslateMessageGroupPathVariables`
2. Renamed configuration variables -
* `TranslateBlacklist` --> `TranslateDisabledTargetLanguages`
* `TranslateAuthorBlacklist` --> `TranslateAuthorExclusionList`
* `TranslateCheckBlacklist` --> `TranslateValidationExclusionFile`
3. Remove `Validator` and `LegacyValidatorAdapter`. See: https://gerrit.wikimedia.org/r/685438
4. Remove `class_aliases` from `src/` to conclude the namespace rename. See: https://gerrit.wikimedia.org/r/684087
5. Limit the number of pages that can be moved from UI, and add `moveTranslatablePage` script
6. SECURITY: Enhance validation and logging for AggregateGroups API deletions
## ULS
1. No major incompatible changes