Update github action

.github/workflows/build.yml → .github/workflows/test.yml

@@ -3,16 +3,9 @@ on: push
 jobs:
   tests:
     runs-on: ubuntu-latest
-    name: Tests
     steps:
       - uses: actions/checkout@v2
 
-      - name: Cache Composer
-        uses: actions/[email protected]
-        with:
-          path: ~/.composer/cache/files
-          key: dependencies-composer-${{ hashFiles('composer.json') }}
-
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
@@ -21,7 +14,7 @@ jobs:
           coverage: none
 
       - name: Install Composer dependencies
-        run: composer install --prefer-dist --no-interaction --no-ansi --no-progress
+        run: composer update --prefer-dist --no-interaction --no-ansi --no-progress
 
       - name: Execute tests
         run: |