[TASK] Migrate the PHPStan check to GitHub actions (#239)

.github/workflows/ci.yml

@@ -71,6 +71,17 @@ jobs:
         uses: actions/checkout@v2
       - name: "Run PHP CS Fixer"
         uses: TYPO3-Continuous-Integration/TYPO3-CI-PHP-CS-Fixer@v1
+  phpstan-check:
+    name: "PHPStan check"
+    runs-on: ubuntu-20.04
+    needs: php-lint
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v2
+      - name: "Run PHPStan"
+        uses: TYPO3-Continuous-Integration/TYPO3-CI-PHPStan@v1
+        with:
+          config_file: './phpstan.neon'
   copypaste-detector:
     name: "Copy'n'paste detector"
     runs-on: ubuntu-20.04
@@ -110,7 +121,6 @@ jobs:
         command:
           - "composer:normalize"
           - "php:sniff"
-          - "php:stan"
         php-version:
           - 7.4
   code-quality-frontend: