updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -23,6 +23,9 @@
 ## Cache
   * [LFUCache](https://github.com/TheAlgorithms/Javascript/blob/master/Cache/LFUCache.js)
   * [LRUCache](https://github.com/TheAlgorithms/Javascript/blob/master/Cache/LRUCache.js)
+  * [Memoize](https://github.com/TheAlgorithms/Javascript/blob/master/Cache/Memoize.js)
+  * test
+    * [Memoize](https://github.com/TheAlgorithms/Javascript/blob/master/Cache/test/Memoize.test.js)
 
 ## Cellular-Automata
   * [ConwaysGameOfLife](https://github.com/TheAlgorithms/Javascript/blob/master/Cellular-Automata/ConwaysGameOfLife.js)