v0.1

Initial release

What's Changed

• Add initial diff-diff library implementation by @igerber in #1
• Add fixed effects and absorb parameters to DifferenceInDifferences by @igerber in #2
• Add robust parallel trends testing with Wasserstein distance by @igerber in #3

New Contributors

• @igerber made their first contribution in #1

Full Changelog: https://github.com/igerber/diff-diff/commits/v0.1