ABI summary:

Enhancements:

Make attached surfaces respect exclusive zones
split mg::Platform into DisplayPlatform and RenderingPlatform
[gbm-kms] Add --driver-quirks option to avoid probing devices where probing crashes
[Wayland] Respect --enable-key-repeat with Wayland
[Wayland] Send timestamps with frame done event
[Wayland] Send timestamps with frame done event
[X11 platform] Add hostname to title when remote over X-forwarding (Fixes #1889)
[X11 platform] Port from XLib to XCB
[X11 platform] Don't clamp Mir-on-X window size
[X11 platform] Allow resizing Mir-on-X windows

Keep track of past surface states (Fixes #1979)
Place popups on output their anchor is on (Fixes #1408)
[mirplatform] Fix mirplatform.pc include dirs
[X11 platform] Fix cursor position on scaled outputs (Fixes #2034)
[X11 platform] Handle key state changes when window is not focused (Fixes #2029)
[XWayland] Gracefully handle XWayland errors (Fixes #1969)
[Wayland] Send bufferless frame callbacks after timeout (Fixes #1967)
[Wayland] Fix resize of layer shell surfaces (Fixes #1986)
[Wayland] Check for locked cursor before sending pointer movement
[Wayland platform] Precise (floating point) pointer events. (Fixes #1852)