v2.1.0

⚠️ Breaking Changes
This release contains breaking changes for Calendar Tags.
The reason this release contains breaking changes is because Calendar Tags never functioned as intended. Therefore, we are fixing a bug, not introducing a feature change.

What's Changed

• [Calendar] Fix Tag Relationships by @onairmarc in https://github.com/EncoreDigitalGroup/planningcenter-php-sdk/pull/36

Full Changelog: v2.0.1...v2.1.0