atomistics 0.1.9

What's Changed

• Update readthedocs environment by @jan-janssen in #85
• Bump structuretoolkit from 0.0.12 to 0.0.15 by @dependabot in #87
• Bump pylammpsmpi from 0.2.6 to 0.2.8 by @dependabot in #86
• Update pylammpsmpi 0.2.9 by @jan-janssen in #88

Full Changelog: atomistics-0.1.8...atomistics-0.1.9