- Use GCC 10 to build neochat on Leap.

- update to 22.06:
* Sending of typing notifications can now be disabled.
* In the room list, the scrollbar will now disappear correctly when it is not needed.
* On wayland, NeoChat will now raise correctly when clicking on a notification.
* Several bugs have been fixed that would sometimes cause messages containing
markdown and/or HTML elements to be sent incorrectly.
* The quick switcher can now be controlled using the mouse.
* There is now an option to disable automatic room sidebar opening when
resizing the window.
* Creation of custom emojis has been fixed.
* Editing or replying to the last message using the keyboard shortcuts now
works correctly.
* When switching between rooms using the keyboard, the switching direction is
now correct.