v3.3.2
MS-last(Improve frontend types): Remove Unknown (#16597)
Fix part of #2575: Interactions refactor first milestone (#4115)
Added Mypy type annotations to the `extensions` directory. (#16083)
Milestone 3 of migrating Oppia ML pipeline (#12091)
Milestone 1.1 (Improve line and branch coverage for the frontend and the backend): Checks to ensure that every backend file has an associated test file (#15625)
Fix part of #6550: Write backend tests for skill_jobs_one_off, story_jobs_one_off, user_query_jobs_one_off , value_generators_domain, and visualization_registry (#6710)
Introduce angular router (#13305)
Milestone 1.2 (Migrate away from protractor): Setup webdriverio and migrate few tests suite from protractor to webdriverIO (#15614)