Bump to v3.4.0.

math/add.js

@@ -0,0 +1,22 @@
+define([], function() {
+
+  /**
+   * Adds two numbers.
+   *
+   * @static
+   * @memberOf _
+   * @category Math
+   * @param {number} augend The first number to add.
+   * @param {number} addend The second number to add.
+   * @returns {number} Returns the sum.
+   * @example
+   *
+   * _.add(6, 4);
+   * // => 10
+   */
+  function add(augend, addend) {
+    return augend + addend;
+  }
+
+  return add;
+});