[Ovmsdev] Another readthedocs dependency issue

Got another readthedocs dependency issue. Seems the mistune package has been updated from 0.8.4 to 2.0.0, and we now have compatibility issues with readthedocs. The error is: AttributeError: module 'mistune' has no attribute ‘BlockGrammar' ovms build #15510497 <https://readthedocs.org/projects/ovms/builds/15510497/> Similar to the docutils<0.18, I have added a requirements.txt to mistune <2.0.0 to workaround the issue. These python developers really need to learn to follow Linus’s mantra of ’never break user space’. Regards, Mark.