v3.3.0
Milestone 2.1 (Improve line and branch coverage for the frontend and the backend): Increased coverage in some backend files (#16193)
Feature: Introduce angular cli and ahead of time compilation (#16073)
Separate exploration data files from other extensions.
Fix part of #9749: Migrates angular html bind (#15568)
Fix #14085: Deprecate math interactions' unsupported rules and update cust arg name. (#15271)
Fix of #9749: Migrate non-negative-int, numeric-expression, position-of-terms, positive-int, ratio-expression, real, sanitized-url, set-of-algebraic-identifier, set-of-translatable-html-content-ids, subtitled-html editors (#12554)
Milestone 2.3 and 2.4 (Migrate away from protractor): Migrated few test suite from protractor to webdriverIO. (#15969)