Bump to v4.0.0.

internal/baseUnary.js

@@ -0,0 +1,17 @@
+define([], function() {
+
+  /**
+   * The base implementation of `_.unary` without support for storing wrapper metadata.
+   *
+   * @private
+   * @param {Function} func The function to cap arguments for.
+   * @returns {Function} Returns the new function.
+   */
+  function baseUnary(func) {
+    return function(value) {
+      return func(value);
+    };
+  }
+
+  return baseUnary;
+});