* Use micromatch instead of minimatch
micromatch claims to support full Bash 4.3 spec and it actually passes all the tests.
For example this fixes processing of '!(**/*.tsx|**/*.less)' pattern - needed by #45
* Update CHANGELOG.md
* Remove usage of --no-auto-gc option
This option is not supported in git versions < 2.23.
Older git versions might be used in self-hosted runners.
* Update CHANGELOG
* Avoid code repetition with exec() and output listeners
* Improve behavior for new branches and when it's running in ACT
* Detect parent commit only if needed
* Fix parent commit detection for initial commit
* Improve logging
* Improve current ref detection
* Fix issue when base is a already fetched tag
* Fix issue when base is a already fetched tag
* Update README
* Document usage with act
* Use `git log` to get changes in latest commit
* Disable other output for `git log`
* get short name from base ref + improve loggig
* update CHANGELOG
* Add support for nested arrays of path expressions
* Remove pull_request trigger type options
Default value is fine: opened, synchronize, reopened
* Add CHANGELOG
* Update README
