Cache vendor folder per PHP version

Author: angelov

.github/workflows/default.yaml

@@ -29,7 +29,7 @@ jobs:
         uses: actions/cache@v3
         with:
           path: vendor
-          key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
+          key: ${{ runner.os }}-php-${{ matrix.php-versions }}-${{ hashFiles('**/composer.lock') }}
           restore-keys: |
             ${{ runner.os }}-php-