[omemo] Update CHANGELOG & manifest.ini

omemo/CHANGELOG

+2.4.3 / 2017-11-15
+- Use Gajim API to announce caps
+
 2.4.2 / 2017-11-15
 - Query devicelists for contacts where we have none, this makes us a bit more independent from PEP
 - Fix encrypting in Groupchats

omemo/manifest.ini

 [info]
 name: OMEMO
 short_name: omemo
-version: 2.4.2
+version: 2.4.3
 description: OMEMO is an XMPP Extension Protocol (XEP) for secure multi-client end-to-end encryption based on Axolotl and PEP. You need to install some dependencys, you can find install instructions for your system in the Github Wiki.
 authors: Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>
  Daniel Gultsch <daniel@gultsch.de>