Update CHANGELOG.md

fix deprecated sphinx method

Version bump

Update CHANGELOG.md

Add required pyproject.toml file for build

Update changelog, v0.3.1 release.

v0.3.0 release

Fixes #9 & #7 as well as a few other errors revealed by tests.

Merge pull request #6 from j-andrews7/playerstats-fix

Playerstats fix

Merge pull request #3 from j-andrews7/v0.2.0

v0.2.0

Update index.rst