Update php.yml

Author: jb-lopez

.github/workflows/php.yml

@@ -17,6 +17,8 @@ jobs:
     - uses: shivammathur/setup-php@v2
       with:
         php-version: ${{ matrix.php }}
+    - name: Install ext-trader
+      run: pecl install trader
     - name: Install Composer dependencies
       run: composer install --prefer-dist --no-progress --no-suggest
     - name: Run tests