Add support for Laravel 8

Author: DivineOmega

composer.json

@@ -4,7 +4,7 @@
     "type": "library",
     "require": {
         "php": ">=7.1",
-        "laravel/framework": "^5.6||^6.0||^7.0",
+        "laravel/framework": "^5.6||^6.0||^7.0||^8.0",
         "divineomega/php-countries": "^2.1",
         "divineomega/php-postcodes": "^4.2",
         "langleyfoxall/simple-google-maps": "^1.0",