Summary
- firefox: remove mediator (commit: 544c8c1) (details)
- virtualenv: update to 20.10.0 (commit: 9db2b86) (details)
- meson: update to 0.60.1 (commit: 921a9a7) (details)
- Upgrade of mercurial to 5.9.3 with python 3.7 and 3.9 (commit: 4881ab6) (details)