Resolve "Gym to gymnasium migration environment render is missed"
Closes #215 (closed)
Breaking changes:
- Render_mode is defined during initialisation and forbids the change of the render mode on-the-fly. How to update the environment: Add render_mode argument to init / Remove mode argument to render function and change all occurrences / Update the step and reset methods (https://younis.dev/blog/render-api/)