Fixed parameter name

Author: delqw

Diff for: lib/network.js

@@ -98,9 +98,9 @@ class Network {
           req.setHeader('Content-Length', length + (16 * (names.length - 1)) + 8 + Buffer.byteLength(boundaryKey))
 
           this._sendMultipartParts(boundaryKey, body, data, names, req, 0)
-      } else if (req_options.method == 'POST' && options.data_json) {
+      } else if (req_options.method == 'POST' && options.jsonData) {
           req.setHeader('Content-Type', 'application/json')
-          var body = JSON.stringify(options.data_json)
+          var body = JSON.stringify(options.jsonData)
           req.setHeader('Content-Length', Buffer.byteLength(body))
           req.end(body)
       } else {