Add support for Laravel 5.7 (#25)

* Add support for Laravel 5.7

* Remove invalid StyleCI option

Author: styxit

.styleci.yml

@@ -1,3 +1 @@
 preset: laravel
-
-linting: true

composer.json

@@ -14,8 +14,8 @@
     "require": {
         "php": ">=5.6.4",
         "guzzlehttp/guzzle": "^6.2",
-        "illuminate/notifications": "5.3.*|5.4.*|5.5.*|5.6.*",
-        "illuminate/support": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*",
+        "illuminate/notifications": "5.3.*|5.4.*|5.5.*|5.6.*|5.7.*",
+        "illuminate/support": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*",
         "nesbot/carbon": "^1.21"
     },
     "require-dev": {