added support php 8.0

Author: pvsaintpe

composer.json

@@ -20,8 +20,8 @@
   ],
   "type": "library",
   "require": {
-    "php": "^7.2",
-    "symplify/easy-coding-standard": "^7.0"
+    "php": "^7.2|^7.3|^7.4|^8.0",
+    "symplify/easy-coding-standard": "^7.0|^8.0"
   },
   "minimum-stability": "stable",
   "prefer-stable": true