Introduce CacheCleaner and AbstractCachedProvider (#34)

* Introduce CacheCleaner and AbstractCacheCleanerByTags

Update README.md

* Bump kununu/testing-bundle

Fix tests

* Remove directory from phpunit exclusions

* Add AbstractCachedProvider

Update README.md

* Apply SonarQube suggestions

* Add code review suggestion

* Apply code review suggestion on tests

.github/workflows/auto_assign_owner.yml

@@ -0,0 +1,13 @@
+name: Auto assign owner when opening PRs
+on:
+  pull_request:
+    types: [ opened ]
+jobs:
+  auto-assign-owner:
+    if: startsWith(github.event.ref, 'dependabot/') == false
+    runs-on: ubuntu-latest
+    steps:
+      - name: Auto assign owner
+        uses: danielswensson/[email protected]
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}