Merge pull request watts-dev#117 from paulromano/release-0.5.2

Update version number to 0.5.2 and update copyright

Merge pull request watts-dev#103 from paulromano/release-0.5.1

Update version number to 0.5.1

Merge pull request watts-dev#90 from paulromano/release-0.5.0

Update version number to 0.5.0

Merge pull request watts-dev#72 from paulromano/release-0.4.0

Update version number to 0.4.0

Merge pull request watts-dev#54 from paulromano/release-0.3.0

Update version number to 0.3.0

Merge pull request watts-dev#30 from paulromano/release-0.2.0

Update version number to 0.2.0

Merge pull request watts-dev#15 from paulromano/release-0.1.0

Add GH action for publishing to PyPI