Bump to v4.0.0.

pickBy.js

@@ -0,0 +1,25 @@
+import baseIteratee from './internal/baseIteratee';
+import basePickBy from './internal/basePickBy';
+
+/**
+ * Creates an object composed of the `object` properties `predicate` returns
+ * truthy for. The predicate is invoked with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The source object.
+ * @param {Function|Object|string} [predicate=_.identity] The function invoked per property.
+ * @returns {Object} Returns the new object.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': '2', 'c': 3 };
+ *
+ * _.pickBy(object, _.isNumber);
+ * // => { 'a': 1, 'c': 3 }
+ */
+function pickBy(object, predicate) {
+  return object == null ? {} : basePickBy(object, baseIteratee(predicate));
+}
+
+export default pickBy;