Consider adding tags matching the PyPI releases

[davide125]

Hi, it looks like this package is released to PyPI: https://pypi.org/project/crossword/ but the repository doesn't have a corresponding tag to the upload releases, making it a bit tricky to match exactly. I think the right commit for 0.1.2 would be https://github.com/svisser/crossword/commit/57078ad5ab5e1ef1bfaa909ca392e1c76e99be1f but I'm not sure about previous ones. I'd be great to get at least 0.1.2 tagged properly here. Thanks!