update to laravel 6

Author: jonrobinson

composer.json

@@ -9,10 +9,10 @@
     "license": "MIT",
     "require": {
         "php": ">=7.1.0",
-        "illuminate/support": "5.*",
-        "illuminate/notifications": "5.*",
-        "illuminate/console": "5.*",
-        "illuminate/database": "5.*"
+        "illuminate/support": "6.*",
+        "illuminate/notifications": "6.*",
+        "illuminate/console": "6.*",
+        "illuminate/database": "6.*"
     },
     "autoload": {
         "psr-0": {