GA: phpstan & tests running for PHP 8.1 as well (related to #162)

Author: uestla

.github/workflows/static-analysis.yml

@@ -4,13 +4,19 @@ on: [push, pull_request]
 
 jobs:
     phpstan:
-        name: PHPStan
         runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                php: ['7.2', '7.3', '7.4', '8.0', '8.1']
+
+            fail-fast: false
+
+        name: PHP ${{ matrix.php }} PHPStan
         steps:
             - uses: actions/checkout@v2
             - uses: shivammathur/setup-php@v2
               with:
-                  php-version: 7.4
+                  php-version: ${{ matrix.php }}
                   coverage: none
 
             - run: composer install --no-interaction

.github/workflows/tests.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']
 
             fail-fast: false