Bump to v3.0.0.

array/flattenDeep.js

@@ -0,0 +1,21 @@
+import baseFlatten from '../internal/baseFlatten';
+
+/**
+ * Recursively flattens a nested array.
+ *
+ * @static
+ * @memberOf _
+ * @category Array
+ * @param {Array} array The array to recursively flatten.
+ * @returns {Array} Returns the new flattened array.
+ * @example
+ *
+ * _.flattenDeep([1, [2], [3, [[4]]]]);
+ * // => [1, 2, 3, 4];
+ */
+function flattenDeep(array) {
+  var length = array ? array.length : 0;
+  return length ? baseFlatten(array, true) : [];
+}
+
+export default flattenDeep;