Psytricks

Fixed

* `Set-AccessUsers()` in `psytricks-lib.ps1` did not work correctly if multiple
usernames were specified. This is now fixed by foce-converting the given
string into an array, splitting at "`,`" characters. This directly affects the
functionality for adding / removing multiple users at once via
`psytricks.wrapper.ResTricksWrapper.set_access_users()` and
`psytricks.wrapper.PSyTricksWrapper.set_access_users()`.

Changed

* Type hints and docstrings were fixed, some of them were indicating the wrong
return types.

Changed

* Logging level changes only, reducing messages higher than debug.

Changed

* The version check done when instantiating a `psytricks.wrapper.ResTricksWrapper`
object now allows for a `PATCH` level mismatch as by definition the API is
still expected to be fully compatible. It issues a warning-level log message
to indicate the mismatch though. This allows for easy fixes on the Python
side of the package without having to re-install / upgrade the server side
each time. A small fix to respect pre-releases following the semantic
versioning rules has been added as well.

Changed

* Updated [loguru] dependency to `0.7.0`.

No functional / code changes, only lowering minimal Python version to `3.9`.