After the CVE-2020-15228 vulnerability,
we can't issue commands with sensitive data on this action anymore.
Due to that, the JSON output that this action generated was removed.
BREAKING CHANGE: GITHUB_TOKEN env var is now ignored. In case a custom token is needed,
it'll be necessary to pass it via the `token` input from now on.
BREAKING CHANGE: this includes breaking changes from commitlint v9,
like the fact that `improvement` type is now rejected in `@commitlint/config-conventional`.