Missing promisified overloads

[JumpLink]

@ewlsh Some promisified methods are missing, for example for Gio.read_async + Gio.read_finish or Gio.File.load_contents_async + Gio.File.load_contents_finish

[ewlsh]

I'm looking at what happened here, should have a fix in the next few weeks.

[swsnr]

I'm upgrading a GNOME extension to ts-for-gir 4.0.0 types, and noticed missing promisified overloads as well:

• Soup.Session.send_async
• Soup.Session.send_and_read_async
• Gio.File.delete_async

Is this the same issue, or should I rather open a new one?

[JumpLink]

@swsnr I think this will be the same problem, so it will be correct here.

@ewlsh In v3 I just checked if there are methods with the same prefix and ending with _async and the other with _finish, but that might not be so clean either, especially since there are some cases where this convention is not followed