v1.2

What's Changed

• Use typing "Optional" to support py3.7 by @raneq in #3
• Add tests by @sbidoul in #4
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #1

New Contributors

• @raneq made their first contribution in #3
• @sbidoul made their first contribution in #4
• @pre-commit-ci made their first contribution in #1

Full Changelog: v1.1...v1.2