v0.12.7

Dependency updates. Includes a bugfix for username mentions in markdownz.

What's Changed

• Bump markdownz from 8.1.4 to 8.2.0 by @dependabot in #278
• Bump sinon from 1.17.7 to 16.1.0 by @dependabot in #279

Full Changelog: v0.12.6...v0.12.7