Log Message:
py-restructuredtext_lint: updated to 1.3.0

1.3.0 - Added Python 3.7 support
1.2.2 - Dropped PyYAML dev dependency to fix GitHub vulnerability warning
1.2.1 - Dropped Python 3.3 from Travis CI to fix testing errors
1.2.0 - Added directory support
1.1.3 - Updated documentation and typos