Update composer.json (#12)

* Updated to either 5.8 or 6

Author: qschmick

composer.json

@@ -23,7 +23,7 @@
     ],
     "require": {
         "php": "^7.1",
-        "laravel/framework": "^5.7"
+        "laravel/framework": "^5.8 | ^6.0"
     },
     "require-dev": {
         "mockery/mockery": "~1.0",