Remove composer v1 in tests

Author: Václavík Jan

.github/workflows/code_checks.yaml

@@ -20,7 +20,7 @@ jobs:
           php-version: ${{ matrix.php }}
           coverage: none
 
-      - run: composer selfupdate 1.10.25 --no-progress
+#      - run: composer selfupdate 1.10.25 --no-progress
       - run: composer install
       - run: vendor/bin/phpcs --standard=ruleset.xml --extensions=php --encoding=utf-8 --tab-width=4 -sp src/ --ignore=bootstrap.php
       - run: vendor/bin/phpcs --standard=ruleset.xml --extensions=php,phpt --encoding=utf-8 --tab-width=4 -sp tests/