Add Laravel 5.4.* support

Author: frezno

composer.json

@@ -11,9 +11,9 @@
     ],
     "require": {
         "php": ">=5.4.0",
-        "illuminate/support": "5.0.*|5.1.*|5.2.*|5.3.*",
-        "illuminate/validation": "5.0.*|5.1.*|5.2.*|5.3.*",
-        "illuminate/translation": "5.0.*|5.1.*|5.2.*|5.3.*"
+        "illuminate/support": "5.0.*|5.1.*|5.2.*|5.3.*|5.4.*",
+        "illuminate/validation": "5.0.*|5.1.*|5.2.*|5.3.*|5.4.*",
+        "illuminate/translation": "5.0.*|5.1.*|5.2.*|5.3.*|5.4.*"
     },
     "require-dev": {
         "mockery/mockery": "~0.9",