Bump to v4.0.0.

internal/setToArray.js

@@ -0,0 +1,21 @@
+define([], function() {
+
+  /**
+   * Converts `set` to an array.
+   *
+   * @private
+   * @param {Object} set The set to convert.
+   * @returns {Array} Returns the converted array.
+   */
+  function setToArray(set) {
+    var index = -1,
+        result = Array(set.size);
+
+    set.forEach(function(value) {
+      result[++index] = value;
+    });
+    return result;
+  }
+
+  return setToArray;
+});