change homestead version for php 5.6

Author: joselfonseca

composer.json

@@ -32,7 +32,7 @@
         "phpspec/phpspec": "~2.1",
         "scrutinizer/ocular": "~1.1",
         "barryvdh/laravel-ide-helper": "2.1.*",
-        "laravel/homestead": "^3.0"
+        "laravel/homestead": "^2.0"
     },
     "autoload": {
         "classmap": [