Merge pull request #265 from janw-me/master

Updated minimum required PHP version to 5.6

Author: schlessera

composer.json

@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "^5.4 || ^7.0",
+        "php": "^5.6 || ^7.0",
         "wp-cli/wp-cli": "dev-master"
     },
     "require-dev": {