cocos2d-x-cocos2d-x-3.1alpha0
.The iOS and Android example projects are till for v2 and haven't been updated, I'll do that last. I considered deleting them until that was done but then figured that would make more work if someone wants to get to it first.
kzerse, from a few small polls, it seems most users wanted cocos2d-x v3. It is a lot more work to support multiple versions of the same libraries. With 18 runtimes, even just twice as much work is significant. I would rather not officially support older versions if at all possible, especially if only a handful of users need it. If you need to upgrade for new features (meshes, FFD, skinning) then I would suggest back porting those features to the v2 runtime. spine-c does most of it for you, it is only rendering that needs to be implemented. If the existing runtime is working for you, maybe you don't need to use the latest runtime?