v3.4.3
Release Automation [Milestone 7]: Automation for initial release preparation (#8005)
Changes to the release process and test improvements (#17154)
Fix part of #13341: Added Mypy type annotations to the `script directory`'s pending files. (#16226)
Fix part of #21020: Upgrade Python to 3.9 (#21215)
Milestone 2.2 (Improve line and branch coverage for the frontend and the backend): Increased coverage in some backend files (#16231)
Fix part of issue #8423 Lint concatenation checker (#19908)
Remove unused dependencies: `py` (via `pytest` upgrade)and `PyGithub` (#19553)