Update to tdlib 1.8.0

[dazboga]

• use pkgconfig for tgvoip library
• require tdlib version to be at least 1.8.0
• resolve problem with updateUserChatAction->updateChatAction
• fix name change in chatInviteLink.expiry_date_ -> chatInviteLink.expiration_date_

[BenWiederhake]

Works for me, and the diff looks good. Thank you! :D

[SchweinDeBurg]

Works for me too, many thanks @dazboga ! I've packaged tdlib from "master" branch (commit daef14ade1120dc3a19a3ba1fd6cf90b1c83b8db "Return NodePointer instead of iterator in find/emplace") and then successfully built and used tdlib-purple version 0.8.1.

[Thaodan]

What is missing for this to be merged?

[edhelas]

Bump

[BenWiederhake]

Hey everyone and especially dazboga, I've collected all open PRs into my master branch. I don't make any promises about keeping it up-to-date though.

https://github.com/BenWiederhake/tdlib-purple/#new-libpurple-plugin-for-telegram

[ildar]

Pros: + `Unsupported User`s came back to normal (separate) users + availability priority seem to be fixed Cons: - Chats stopped working where the user has `Admin` privilege. Normal user and Owner privs. chats work ok. Anybody aware of the latest? @BenWiederhake ?

[ildar]

de-Admin-ing returned a chat back to working.

[UnitedMarsupials]

This allows compiling the plugin itself, but not the tests -- some more patching is needed in that subdirectory.