Bump to v4.17.0.

_baseAssignIn.js

@@ -0,0 +1,17 @@
+define(['./_copyObject', './keysIn'], function(copyObject, keysIn) {
+
+  /**
+   * The base implementation of `_.assignIn` without support for multiple sources
+   * or `customizer` functions.
+   *
+   * @private
+   * @param {Object} object The destination object.
+   * @param {Object} source The source object.
+   * @returns {Object} Returns `object`.
+   */
+  function baseAssignIn(object, source) {
+    return object && copyObject(source, keysIn(source), object);
+  }
+
+  return baseAssignIn;
+});