Testing Locally:
asdf plugin test <plugin-name> <plugin-url> [--asdf-tool-version <version>] [--asdf-plugin-gitref <git-ref>] [test-command*]
# TODO: adapt this
asdf plugin test license-plist https://github.com/MacPaw/asdf-license-plist.git "license-plist --help"
Tests are automatically run in GitHub Actions on push and PR.