Update test.yml

Author: bnomei

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '7.2'
+          php-version: '7.3'
           tools: composer
 
       - name: Install