GMSO 0.9.1

Breaking change

• Stop testing and supporting Python 3.7 by @daico007 in #693

Features

• Support breaking changes from pydantic>=v1.9 by @umesh-timalsina in #691, #689

Maintenance

• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #692
• Testing GMSO XML handling and Conversions, Forcefield-utilities backend by @CalCraven in #690
• pin foyer and ffutils version by @daico007 in #694

Full Changelog: 0.9.0...0.9.1