v0.11.1

This is the last release to support Python 2!

What's Changed

• fix: Use valid project/version requirement specifiers by @matthewfeickert in #218
• ci: Use micromamba to test Python and ROOT by @matthewfeickert in #220
• build: Add requires-python metadata by @matthewfeickert in #222

Full Changelog: v0.11.0...v0.11.1