Use vendored json-stringify-safe in raven.js

Author: LewisJEllis

src/raven.js

@@ -2,14 +2,13 @@
 'use strict';
 
 var TraceKit = require('../vendor/TraceKit/tracekit');
+var stringify = require('../vendor/json-stringify-safe/stringify');
 var RavenConfigError = require('./configError');
 var utils = require('./utils');
 
 var isError = utils.isError,
     isObject = utils.isObject;
 
-var stringify = require('json-stringify-safe');
-
 var wrapConsoleMethod = require('./console').wrapMethod;
 
 var dsnKeys = 'source protocol user pass host port path'.split(' '),