Update tests.yml

Author: tarampampam

.github/workflows/tests.yml

@@ -40,6 +40,7 @@ jobs: # Docs: <https://help.github.com/en/articles/workflow-syntax-for-github-ac
         with:
           php-version: ${{ matrix.php }}
           extensions: mbstring, pdo, pdo_sqlite, sqlite3 # definition is required for php 7.4
+          tools: composer:v1 # TODO update composer up to v2
 
       - name: Get Composer Cache Directory # Docs: <https://github.com/actions/cache/blob/master/examples.md#php---composer>
         id: composer-cache