Published on 2021-08-01.

* chore(common/core): additional debug tests  (#5482)
* chore(common/core): handle deletion of markers in actions  (#5489)
* chore(common): stable history update (#5515)
* chore(common/core): refactor backspace handling  (#5512)
* fix(ios/engine): engine migration always precedes installs (#5484)
* chore(common): Add C++ formatting rules (#5523)

* Minor fixes and performance improvements