Run static tests on PHP 8.1

Author: AydinHassan

.github/workflows/static.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: ['7.2', '7.3', '7.4', '8.0']
+        php: ['7.2', '7.3', '7.4', '8.0', '8.1']
     name: Code Style
 
     steps:
@@ -29,4 +29,4 @@ jobs:
         run: composer run cs
 
       - name: Run PHPStan
-        run: composer run static
+        run: composer run static