Update composer.json

Set the minimum laravel framework version for laravel 6 as 6.20.26. Because of some security threats in previous versions.

Author: theriddleofenigma

composer.json

@@ -9,7 +9,7 @@
         }
     ],
     "require": {
-        "laravel/framework": "^5.0|^6.20.14|^7.0|^8.0"
+        "laravel/framework": "^5.0|^6.20.26|^7.0|^8.0"
     },
     "autoload": {
         "psr-4": {