* Rework change detection via `git diff`
Previous implementation performed simple diff between two versions. New implementation fetches on demand more commits to have the merge base between two branches. Now it will detect only changes introduced by branch that was pushed, instead of mixing with changes introduced meanwhile on the base branch.
* Add support for specification of change type (add,modified,delete)
* Use NULL as separator in git-diff command output
* Improve PR test workflow
* Fix the workflow file
* 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
* Enable minimatch dot option
It's not a default globbing behavior, however for our use-case is much more convenient to match those files.
* Update README and package.json
* Remove accidental string interpolation from action.yml
* Fix test workflow filters
* Improve self-test
* Add test case for matching any changed file
* Fix workflow test - step `name` was used instead of `id`
* Extend default pull_request trigger types
* Remove `edited` trigger to avoid executing workflow on non-code changes
