Update libmatekbd to 1.20.1:

remove < gtk+-3.22 bits and bump required gtk+
WidthOfScreen and HeightOfScreen implementation
matekbd-status: Fix Gdk-CRITICAL warning on creating status bar icon
gtk 3.22: avoid deprecated gdk_screen_get_monitor functions:
avoid deprecated gdk_screen_get_width/height
avoid deprecated gdk_screen_get_number
matekbd-indicator: Don窶冲 expand
matekbd-indicator: don窶冲 use deprecated gdk_cairo_create
Fix for strange GtkIconInfo behaviour
matekbd-indicator: don窶冲 use deprecated GtkAlignment
keyboard-drawing: set css name matekbd-keyboard-drawing
Slightly increase the font size for the key labels
matekbd-keyboard-drawing: Don窶冲 unset double buffering
matekbd-keyboard-drawing: Handle XkbGetKeyboard() failing
matekbd-keyboard-drawing: Prevent gtk+ keynav from taking focus away
fix some introspection warnings
show-layout.ui: don窶冲 use deprecated widgets
UI: expand kbdraw vertical
Translations update

(youri)