Update to 1.29.6.
- This release fixes a connectivity issue to Signal servers.
- Fixes an issue where the most recent messages of a conversation wouldn't appear on first load of a conversation
- Fixes an issue where a received standalone conversation timer update might be ignored
- Fixes an issue where a view-once message viewed on another device might not result in a viewed state in desktop
- Fixes an issue where a 'Identity key changed' error might show repeatedly on attempted messages sends to a contact