Added in an emulator for coding extensions

no more exiting the instance just to constantly reupload your extension to see if it works.
write many times, test once. :)

src/updateNotification.js

@@ -1,6 +1,6 @@
 const Gitea_OWNER = 'ItsSkaiya'; 
 const Gitea_REPO = 'WaifuBoard'; 
-const CURRENT_VERSION = 'v1.6.2'; 
+const CURRENT_VERSION = 'v1.6.3'; 
 const UPDATE_CHECK_INTERVAL = 5 * 60 * 1000; 
 
 let currentVersionDisplay;