Can you change SleekXMPP (dead project) to Slixmpp (Successor)

[Neustradamus]

@ritzmann: Can you update the code for compatibility with the successor of SleekXMPP?

• https://lab.louiz.org/poezio/slixmpp
• https://github.com/poezio/slixmpp

[ritzmann]

I would be rather surprised if anybody else but me used this code but I will look into it when I have a bit of time.