Re-enable PHP 8.1 tests

Author: driesvints

.github/workflows/tests.yml

@@ -76,7 +76,6 @@ jobs:
           command: composer update --${{ matrix.stability }} --prefer-dist --no-interaction --no-progress
 
       - name: Execute tests
-        continue-on-error: ${{ matrix.php > 8 }}
         run: vendor/bin/phpunit --verbose
         env:
           DB_PORT: ${{ job.services.mysql.ports[3306] }}
@@ -137,5 +136,4 @@ jobs:
           command: composer update --${{ matrix.stability }} --prefer-dist --no-interaction --no-progress
 
       - name: Execute tests
-        continue-on-error: ${{ matrix.php > 8 }}
         run: vendor/bin/phpunit --verbose