Upgrade to Laravel 5.6 and Dingo 2.0.0-alpha2

Author: joselfonseca

composer.json

@@ -14,10 +14,10 @@
     ],
     "require": {
         "php": ">=7.1.0",
-        "dingo/api": "2.0.0-alpha1",
-        "fideloper/proxy": "~3.3",
-        "laravel/framework": "5.5.*",
-        "laravel/passport": "^4.0",
+        "dingo/api": "2.0.0-alpha2",
+        "fideloper/proxy": "~4.0",
+        "laravel/framework": "5.6.*",
+        "laravel/passport": "^5.0",
         "laravel/tinker": "~1.0",
         "predis/predis": "^1.1",
         "spatie/laravel-permission": "^2.6",
@@ -27,7 +27,7 @@
         "filp/whoops": "~2.0",
         "fzaninotto/faker": "~1.4",
         "mockery/mockery": "0.9.*",
-        "phpunit/phpunit": "~6.0"
+        "phpunit/phpunit": "~7.0"
     },
     "autoload": {
         "classmap": [