Batcave

- Changed
- Convert Path to str before passing to COM handler.

- Changed
- Allow multiple property holders in Expander.
- Fix lang.flatten() and add lang.flatten_string_list().
- Allow bypass of nuget restore in MSBuildBuilder.
- Make sure the results is a Path() in MSTestUnitTester.
- Add support for dashboards to the qbpy module.
- Fix build when docker authentication fails.
- Upgrade cx_Freeze to 5.1.1.
- Upgrade GitPython to 3.0.2.
- Upgrade pyodbc to 4.0.27.
- Upgrade PyQt5 to 5.13.1.
- Upgrade setuptools to 41.2.0.

- Added
- Added build.DotCoverTester().
- Added build.NUnitTester().
- Added support for command arguments on servermgr.Server().create_scheduled_task().

- Changed
- Fix servermgr.ScheduledTask().TASK_PATH definition on Linux.

- Added
- Added start_in and disable arguments to servermgr.Server().create_scheduled_task().

- Changed
- Fix servermgr.Server().create_scheduled_task() issue when spaces in task executable path.

- Changed
- Improved options for servermgr.Server().create_scheduled_task().
- Upgraded docker to 4.0.2.
- Upgraded PyQt to 5.13.0.