Mod ci install extensions

.github/workflows/php.yml

@@ -26,6 +26,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php-version }}
+          extensions: bcmath,gmp,intl
         env:
           runner: ubuntu-18.04
 
@@ -36,7 +37,7 @@ jobs:
         run: |
              composer require --no-update --no-interaction "laravel/framework:${{ matrix.laravel-version }}"
              composer validate
-             
+
       - name: Cache dependencies
         uses: actions/cache@v2
         with: