Update tests.yml

Author: PineappleIOnic

.github/workflows/tests.yml

@@ -58,11 +58,10 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
 
-      - name: Setup PHP with PECL extension
-        uses: shivammathur/setup-php@v2
-        with:
-          php-version: ${{ matrix.php-version }}
-          extensions: curl
+      - name: Install composer
+        run: |
+          curl -sS https://getcomposer.org/installer | php
+          mv composer.phar /usr/local/bin/composer
 
       - name: Install
         run: composer install