testing/river: upgrade to 0.3.0
https://codeberg.org/river/river/releases/tag/v0.3.0
uses wlroots 0.17.2, so wlroots0.16 wouldn't be required (!56172)
Edited by fossdd
https://codeberg.org/river/river/releases/tag/v0.3.0
uses wlroots 0.17.2, so wlroots0.16 wouldn't be required (!56172)