Support Laravel version 8.x

composer.json

@@ -2,7 +2,7 @@
   "name": "kg-bot/laravel-localization-to-vue",
   "description": "Laravel package used to collect all localization files from resources/lang (and custom) directories and sub-directories and make them available as JSON file",
   "require": {
-    "laravel/framework": "5.*|^6|^7",
+    "laravel/framework": "5.*|^6|^7|^8",
     "ext-json": "*"
   },
   "keywords": [