Update run-tests.yml (thephpleague#672)

Author: sergiy-petrov

.github/workflows/run-tests.yml

@@ -19,7 +19,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [8.0, 7.4, 7.3]
+        php: [8.1, 8.0, 7.4, 7.3]
         dependency-version: [prefer-lowest, prefer-stable]
 
     name: P${{ matrix.php }} - ${{ matrix.dependency-version }}
@@ -40,4 +40,4 @@ jobs:
         composer update --${{ matrix.dependency-version }} --prefer-dist --no-progress
 
     - name: Execute Unit Tests
-      run: composer test
+      run: composer test