v5.0.1

V5 stable release

Notable changes from API V4:

• ID type is now string type, instead of a number.
  To convert types from old (numbers) to new (strings) use Mangadex.converLegacyId method.
• Authentification has changed as well.
  Now to login to your account, create a client const client = new Mangadex() and then call client.auth.login(username, password) method to login, instead of client.agent.
  See examples in readme.
• Some APIs I'm unable to test, like Manga.create, since I don't have permissions, so those APIs are considered unstable and if you have permission to create manga, upload covers and so on, please report how those APIs are working, open an issue, this always helps!

Still WIP, but you can start switching to this version!