opencv-python: https://pypi.org/project/opencv-python/
opencv-contrib-python: https://pypi.org/project/opencv-contrib-python/
opencv-python-headless: https://pypi.org/project/opencv-python-headless/
opencv-contrib-python-headless: https://pypi.org/project/opencv-contrib-python-headless/
Changes:
- Switched to a single binary release with Python Limited API to cover all Python versions since 3.6. #595