use master

Author: torounit

.github/workflows/push-test-deploy.yml

@@ -35,7 +35,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@v2.15
+        uses: shivammathur/setup-php@master
         with:
           tools: phpunit-polyfills, phpunit
           php-version: ${{ matrix.php }}