Fix tests

Author: karser

.github/workflows/code_checks.yaml

@@ -52,7 +52,8 @@ jobs:
       - name: Restrict Symfony version
         if: matrix.symfony != ''
         run: |
-          composer global require --no-progress --no-scripts --no-plugins "symfony/flex:^1.10"
+          composer global require --no-progress --no-scripts --no-plugins "symfony/flex"
+          composer global config --no-plugins allow-plugins.symfony/flex true
           composer config extra.symfony.require "${{ matrix.symfony }}"
 
       - name: Install PHP dependencies