Update dependencies for Laravel 5.5

Author: Kevin Richter

.travis.yml

@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 5.6
   - 7.0
   - 7.1
 

composer.json

@@ -9,21 +9,28 @@
     }
   ],
   "require": {
-    "php": ">=5.6.4",
-    "illuminate/database": "5.4.*",
-    "illuminate/support": "5.4.*",
-    "illuminate/queue": "5.4.*",
+    "php": ">=7.0",
+    "illuminate/database": "5.5.*",
+    "illuminate/support": "5.5.*",
+    "illuminate/queue": "5.5.*",
     "php-amqplib/php-amqplib": "2.6.*"
   },
   "require-dev": {
-    "phpunit/phpunit": "^5.5",
+    "phpunit/phpunit": "~6.0",
     "mockery/mockery": "^0.9.5"
   },
   "autoload": {
     "psr-4": {
       "VladimirYuldashev\\LaravelQueueRabbitMQ\\": "src/"
     }
   },
+  "extra": {
+    "laravel": {
+      "providers": [
+        "VladimirYuldashev\\LaravelQueueRabbitMQ\\LaravelQueueRabbitMQServiceProvider"
+      ]
+    }
+  },
   "minimum-stability": "dev",
   "prefer-stable": true
 }