Update actions.yml

Author: sanmai

.github/workflows/actions.yml

@@ -27,5 +27,14 @@ jobs:
         with:
           php-version: ${{ matrix.php-version }}
 
+      - name: Cache dependencies
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/composer
+          key: composer-${{ matrix.php-version }}-${{ hashFiles('composer.*') }}
+          restore-keys: |
+            composer-${{ matrix.php-version }}-
+            composer-
+
       - run: composer install --prefer-dist --no-progress --no-suggest
       - run: ./test/run