Release v1.2.0

Fully backwards-compatible refactor of the Action scaffolding based on
modern Action template. It also addresses difficulties with usage as
reported in #5 and makes future development easier by keeping the
latest stable mainline in master branch.

Update v1 tag

Release v1.0.2

Brings updated toolkit to make the action compatible with upcoming
GitHub Action changes that deprecate/remove certain features. Also
changes the default version of BATS to 1.2.1.

Release v1.0.1

Release v1.0.0