Change php version

.github/workflows/ci.yml

@@ -9,6 +9,12 @@ jobs:
     steps:
       - uses: actions/checkout@v1
 
+      - name: Setup PHP, with composer and extensions
+        uses: shivammathur/setup-php@v2 #https://github.com/shivammathur/setup-php
+        with:
+          php-version: '7.4'
+          extensions: mbstring, dom, fileinfo, mysql, libxml, xml, xmlwriter, dom, tokenizer, filter, json, phar, pcre, openssl, pdo, intl, curl
+
       - name: Cache composer dependencies
         uses: actions/cache@v1
         with: