Update composer.json (#47)

Allow for Laravel 8.x Application Usage.

Author: MadMikeyB

composer.json

@@ -18,8 +18,8 @@
     ],
     "require": {
         "php" : "^7.2",
-        "illuminate/support": "~6.0|~7.0",
-        "illuminate/http": "~6.0|~7.0",
+        "illuminate/support": "~6.0|~7.0|~8.0",
+        "illuminate/http": "~6.0|~7.0|~8.0",
         "symfony/dom-crawler": "^2.7|^3.0|^4.0|^5.0",
         "symfony/css-selector": "^2.7|^3.0|^4.0|^5.0"
     },