Fix Python 3.13 and drop Python 3.7
* [Fix Python 3.13 on Windows](https://github.com/mdmintz/tabcompleter/commit/16ec974781de8a3a1eac2f99fa9d2fd443092065)
* [Drop support for Python 3.7](https://github.com/mdmintz/tabcompleter/commit/ae71b1ae273d1fdb653bbd41ccae71bdabff25e7)
* [Add pyproject.toml](https://github.com/mdmintz/tabcompleter/commit/b01493d50df709abd9a8f9ca00773ae62700f70f)