Update README.md

Author: Akash

README.md

@@ -9,7 +9,7 @@ A Node package for transforming(mapping) one JSON object to another based on a s
 
 ## Usage
 
-    var JSONTransform = require('json-transform');
+    var JSONTransform = require('json_transform');
     var input = {
       "id" : 101,
       "content" : "My first npm package",
@@ -157,4 +157,4 @@ A Node package for transforming(mapping) one JSON object to another based on a s
 
 ## Release History
 
-* 0.1.0 Initial release
+* 0.1.0 Initial release