v0.4.2

DateSelectors v0.4.2

Merged pull requests:

• Open Source (#1) (@oxinabox)
• Remove old links, Add LICENSE etc (#3) (@oxinabox)
• Setup GitHub Actions CI and make Documentation build (#4) (@oxinabox)
• Add a note about invarience (#5) (@oxinabox)
• Run CI on merge into Main (#9) (@oxinabox)
• Correct a few typos in ReadMe (#10) (@Ianlmgoddard)
• Fix slack notification (#11) (@fchorney)
• Fix CI Tests and Artifact Cache Issues (#13) (@fchorney)
• Bump patch version for new docs/CI changes (#21) (@iamed2)