Remove support for PHP 8.0 on QA

Author: williamdes

composer.json

@@ -16,7 +16,7 @@
         "source": "https://github.com/phpmyadmin/sql-parser"
     },
     "require": {
-        "php": ">=5.3.0",
+        "php": "^5.3.0 || ^7.0",
         "symfony/polyfill-mbstring": "^1.3"
     },
     "require-dev": {