mBuild 0.13.0

Features

• Add constraints options to Compound.energy_minimize() (#941)
• Add mass as an attribute of Compound (#869)
• Add support for HOOMD-Blue v3 (#871)
• General improvements to the GOMC writer (#937)

Maintenance

• Update windows installation instructions (#945)
• Migrate azure pipeline environment creation to use mamba (#938)
• Pre-commit autoupdate (#939)
• Update docstring for conversion.py (#942)
• Update Docker image information and entry point (#943)