ITT: Strict Laravel versions support.

Author: dmitry-ivanov

composer.json

@@ -11,7 +11,7 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "illuminate/support": "^5.1",
+        "illuminate/support": "5.1.*|5.2.*|5.3.*|5.4.*",
         "mockery/mockery": "^0.9"
     },
     "require-dev": {