generate new test that did already exist & update all module snippets with declaration

test/JSONToDate/JSONToDate.js

@@ -1,4 +1,4 @@
-module.exports = arr => {
+module.exports = JSONToDate = arr => {
 const dt = new Date(parseInt(arr.toString().substr(6)));
 return `${dt.getDate()}/${dt.getMonth() + 1}/${dt.getFullYear()}`;
 };