cache vendor

.github/workflows/test_and_publish.yml

@@ -21,6 +21,13 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v2
 
+    - name: Set Up Cache
+      uses: actions/cache@v2
+      with:
+        path: |
+          vendor
+        key: vendor-${{ matrix.php }}-${{ hashFiles('composer.json') }}
+
     - name: Set up PHP
       uses: shivammathur/setup-php@master
       with:
@@ -79,6 +86,7 @@ jobs:
       run: |
           wget https://scrutinizer-ci.com/ocular.phar
           php ocular.phar code-coverage:upload --format=php-clover data/coverage.clover
+
   publish:
     name: Publish
     runs-on: ubuntu-latest