Replaced underscore and underscore.string modules with lodash
diff --git a/src/node/index.js b/src/node/index.js
index c09e416..b6a4e2d 100644
--- a/src/node/index.js
+++ b/src/node/index.js
@@ -33,7 +33,7 @@
 
 'use strict';
 
-var _ = require('underscore');
+var _ = require('lodash');
 
 var ProtoBuf = require('protobufjs');