feat(handlers): add getInvite() & deleteInvite() (#421)

* feat(handlers): add getInvite

* feat(handlers): add deleteInvite

* remove deving things

* add jsdoc

* move functions up

* import got deleted

* feat(handlers): invite better types

* throw enum error

* remove unnecessary checks

* Update mod.ts

* channel exists since botHasChannelPermissions did not throw any error

src/api/handlers/mod.ts

@@ -1,11 +1,13 @@
 import {
   channelOverwriteHasPermission,
   createInvite,
+  deleteInvite,
   deleteMessages,
   editChannel,
   followChannel,
   getChannelInvites,
   getChannelWebhooks,
+  getInvite,
   getMessage,
   getMessages,
   getPins,
@@ -133,6 +135,8 @@ export let handlers = {
   getPins,
   isChannelSynced,
   sendMessage,
+  getInvite,
+  deleteInvite,
   startTyping,
 
   // Gateway handler