Bump to v4.0.0.

set.js

@@ -0,0 +1,33 @@
+define(['./internal/baseSet'], function(baseSet) {
+
+  /**
+   * Sets the value at `path` of `object`. If a portion of `path` doesn't exist
+   * it's created. Arrays are created for missing index properties while objects
+   * are created for all other missing properties. Use `_.setWith` to customize
+   * `path` creation.
+   *
+   * @static
+   * @memberOf _
+   * @category Object
+   * @param {Object} object The object to modify.
+   * @param {Array|string} path The path of the property to set.
+   * @param {*} value The value to set.
+   * @returns {Object} Returns `object`.
+   * @example
+   *
+   * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+   *
+   * _.set(object, 'a[0].b.c', 4);
+   * console.log(object.a[0].b.c);
+   * // => 4
+   *
+   * _.set(object, 'x[0].y.z', 5);
+   * console.log(object.x[0].y.z);
+   * // => 5
+   */
+  function set(object, path, value) {
+    return object == null ? object : baseSet(object, path, value);
+  }
+
+  return set;
+});