* add check to ensure action space is non-dict non-tuple for env_checker nan check
* update changelog.rst
* add regression test for new check
* commit-checks
* add more action space checks
* update docstrings
* add warning check
* Add auto formatting with black and isort
* Reformat code
* Ignore typing errors
* Add note about line length
* Add minimum version for isort
* Add commit-checks
* Update docker image
* Fixed lost import (during last merge)
* Fix opencv dependency