Update composer.json

Author: hivokas

composer.json

@@ -5,7 +5,7 @@
     "type": "library",
     "license": "MIT",
     "require": {
-        "php": ">=7.1",
+        "php": "^7.1|^8.0",
         "laravel/framework": "5.5.*|5.6.*|5.7.*|5.8.*|^6.0|^7.0|^8.0"
     },
     "autoload": {