Merge pull request #2 from agallou/fix-php7

fix composer requirements for php7

Author: marijnvdwerf

composer.json

@@ -25,7 +25,7 @@
     }
   },
   "require": {
-    "php": "~5.3",
+    "php": ">=5.3",
     "intervention/image": "~2.2"
   },
   "suggest": {