Release 1.9.0 "Fractal dimension"

Highlights:

- Fixed glib critical when switching layouts
- Fixed minor memory leaks when switching layouts
- Whenever the client supports it, text is sent as text instread of key presses
- New Polish language layout
- Fixed greek layout
- Better key locking
- Less leaks
- Tweaks in terminal layout
- Better emoji layout
6 jobs for 1.9.0 in 36 minutes and 54 seconds (queued for 24 minutes)