Bump to v3.6.0.

internal/createAggregator.js

@@ -7,6 +7,9 @@ import isArray from '../lang/isArray';
  * object composed from the results of running each element in the collection
  * through an iteratee.
  *
+ * **Note:** This function is used to create `_.countBy`, `_.groupBy`, `_.indexBy`,
+ * and `_.partition`.
+ *
  * @private
  * @param {Function} setter The function to set keys and values of the accumulator object.
  * @param {Function} [initializer] The function to initialize the accumulator object.