river 0.3.5

This release updates the required wlroots version to 0.18.

It also leverages new wlroots features to attempt recovery from GPU resets and
improves focus handling of layer surfaces with "on demand" keyboard
interactivity.

Full changelog:

Felix Bowman (1):
      completions: zsh click-method option fix

Isaac Freund (5):
      build: bump version to 0.3.5-dev
      build: update to wlroots 0.18.0
      LayerSurface: minor style/naming tweaks
      river: attempt to recover from GPU resets
      build: bump version to 0.3.5

tiosgz (1):
      LayerSurface: focus on_demand-interactive surfaces on map