Pekka Paalanen is already prepping the Weston development version from 2.0.90 to 2.99.90 with the next version being 3.0. Pekka commented, "We have merged a few patches already that change libweston/compositor.h. While most of the changes arguably change only things libweston users should not be touching, some change the size of e.g. struct weston_output and struct weston_compositor, possibly moving member offsets. We also haven't separated public and private parts from compositor.h yet. To be on the safe side, bump the major now. I'm sure there will be more changes that make the bump obviously necessary."
Wayland 1.14 and now Weston 3.0 are expected to be released in early June per their existing release schedule plans.