Publish Row Renderer

What's Changed

• See original notes from the beta work on the RowRenderer feature: https://github.com/namespace-ee/react-calendar-timeline/releases/tag/0.27.0-beta
• Resolved conflicts with original master / published version in 0.27, and tested for regression

New Contributors

• @sjustason made their first contribution in #5

Full Changelog: v0.27.0...v0.30.3

Publicly released version

This represents what was on the original repo's latest master, and which we've released to our own npm with tag 0.27.0: https://www.npmjs.com/package/@routific/react-calendar-timeline