Bump to v4.0.0.

next.js

@@ -0,0 +1,38 @@
+define(['./toArray'], function(toArray) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /**
+   * Gets the next value on a wrapped object following the
+   * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
+   *
+   * @name next
+   * @memberOf _
+   * @category Seq
+   * @returns {Object} Returns the next iterator value.
+   * @example
+   *
+   * var wrapped = _([1, 2]);
+   *
+   * wrapped.next();
+   * // => { 'done': false, 'value': 1 }
+   *
+   * wrapped.next();
+   * // => { 'done': false, 'value': 2 }
+   *
+   * wrapped.next();
+   * // => { 'done': true, 'value': undefined }
+   */
+  function wrapperNext() {
+    if (this.__values__ === undefined) {
+      this.__values__ = toArray(this.value());
+    }
+    var done = this.__index__ >= this.__values__.length,
+        value = done ? undefined : this.__values__[this.__index__++];
+
+    return { 'done': done, 'value': value };
+  }
+
+  return wrapperNext;
+});