What's Changed
* add python 3.9 classification and pytest entry_point for package by jupe in https://github.com/OpenTMI/pytest-opentmi/pull/21
no need to enable plugin anymore in conftest.py (`pytest_plugins = ("pytest_opentmi.plugin",)`)
**Full Changelog**: https://github.com/OpenTMI/pytest-opentmi/compare/v0.3.8...v0.4.0