Fix.

node_modules/to-object-path/index.js

@@ -0,0 +1,33 @@
+/*!
+ * to-object-path <https://github.com/jonschlinkert/to-object-path>
+ *
+ * Copyright (c) 2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+var typeOf = require('kind-of');
+
+module.exports = function toPath(args) {
+  if (typeOf(args) !== 'arguments') {
+    args = arguments;
+  }
+  return filter(args).join('.');
+};
+
+function filter(arr) {
+  var len = arr.length;
+  var idx = -1;
+  var res = [];
+
+  while (++idx < len) {
+    var ele = arr[idx];
+    if (typeOf(ele) === 'arguments' || Array.isArray(ele)) {
+      res.push.apply(res, filter(ele));
+    } else if (typeof ele === 'string') {
+      res.push(ele);
+    }
+  }
+  return res;
+}