Use plain phpstan action

Author: schmengler

.github/autoload-tests.sh

@@ -7,6 +7,21 @@ on:
     branches: [ master ]
 
 jobs:
+  phpstan:
+
+    name: PHPStan
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: php-actions/composer@v5
+
+      - name: PHPStan Static Analysis
+        uses: php-actions/phpstan@v3
+        with:
+          php_version: 7.4
+          configuration: phpstan.neon
+
   unit-tests:
 
     name: Unit tests
@@ -90,24 +105,6 @@ jobs:
       - uses: actions/checkout@v2
       - uses: extdn/github-actions-m2/magento-mess-detector@master
 
-  phpstan:
-    name: Magento 2 PHPStan
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: extdn/github-actions-m2/magento-phpstan@master
-        with:
-          composer_name: integer-net/magento2-shippingpreselection
-          # Note: module_source needs to be directory with composer.json, otherwise module is installed from github
-          # and phpstan runs on local directory with broken autoloading. So the following does NOT work:
-          #
-          #  module_source: src
-          #
-          # A possible workaround is to modify the root composer autoload section in a preinstall script:
-          #
-          magento_preinstall_script: .github/autoload-tests.sh
-        env:
-          INPUT_MAGENTO_PRE_INSTALL_SCRIPT: .github/autoload-tests.sh
   publish-test-results:
     name: "Publish Tests Results"
     needs: