- Update to version 6.0
* Added a default_timeout argument to the Lock constructor,
which can be used in the context manager syntax as well.
* When a Lock uses a lock file that already exists and does
not appear to be a lock file (i.e. because its contents are
ill-formatted), do a better job of not clobbering that file.
* Improve some QA by re-adding diff-cover, Gitlab SAST during
CI, and testing on Python 3.10 beta (except for Windows)
* Added a py.typed file to satisfy type checkers.
- Update to version 5.0.5
* Blued code.