Note: We're effectively using version 0.2.1 with two patches to link
against wlroots 0.14 (the tag is just not used for "rev" because the
release missed a few important changes to meson.build).
The new release comes with breaking changes so we temporarily introduce
wlroots_0_13 for packages that don't yet support wlroots 0.14.
For the rest of the packages the required upstream patches for this new
wlroots release are fetched (if feasible).
