textproc/py-myst-parser: Allow build with py-markdown-it-py 2.0.0 and py-mdit-py-plugins 0.3.0
- Update version requirement of RUN_DEPENDS
- Bump PORTREVISION for package change
Obtained from: https://github.com/executablebooks/MyST-Parser/commit/43d5c66831cb2578bc034f9d6217d659ddc46847