wrap Plotly to avoid unexpected character

Author: archmoj

lib/index.js

@@ -1,8 +1,8 @@
 'use strict';
 
-var Plotly = require('../src/core');
+var core = require('../src/core');
 
-Plotly.register([
+core.register([
     require('../src/traces/bar'),
     require('../src/traces/box'),
     require('../src/traces/heatmap'),
@@ -56,4 +56,4 @@ Plotly.register([
     require('../src/components/calendars')
 ]);
 
-module.exports = Plotly;
+module.exports = (function(Plotly) { return Plotly; })(core);