feat: Drops old prosody dependency (0.10...).

Many features work only with 0.11+ prosody versions and there are instructions in the handbook how to install it before installing jitsi-meet.

debian/control

 
 Package: jitsi-meet-prosody
 Architecture: all
-Depends: openssl, prosody | prosody-trunk | prosody-0.11, lua-sec
+Depends: openssl, prosody (>= 0.11.0) | prosody-trunk | prosody-0.11, lua-sec
 Replaces: jitsi-meet-tokens
 Description: Prosody configuration for Jitsi Meet
  Jitsi Meet is a WebRTC JavaScript application that uses Jitsi