GMSO 0.12.0

Manuscript

• First draft for GMSO paper by @daico007 in #797, #798

Features

• Add position restraints for Site by @daico007 in #770
• Add to_xml method to Topology by @chrisjonesBSU in #782
• Update GMSO to work with pydantic 2.0 by @daico007 in #745
• Sorting of improper types by @CalCraven in #796
• Write charge in elementary charge unit (XML writer) by @daico007 in #794
• Support Lammps charmm dihedrals by @CalCraven in #787

Bug fixes

• Fix to bug in handling charge loading for JSON serialization by @CalCraven in #793
• Fix bug in GRO reader by @daico007 in #775

Maintenance

• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #772, #779, #784, #790, #791, #800 #772
• Drop support/testing for py3.8 by @daico007 in #781
• Update Dockerfile by @daico007 in #789

Full Changelog: 0.11.2...0.12.0