How to upgrade 0.yz with backwards incompatible API changes?

Question

API

I use semantic versioning. What is the correct way to upgrade 0.yz with backwards incompatible API changes?
UPD:

Major version zero (0.yz) is for initial development. Everything can change at any moment. The public API should not be considered stable.

Is it possible in this case, in branch 0, to simply change the API with a change in the minor version?

Answer 1

On the 0.xx branch, do whatever you want. Here, by default, all changes are incompatible :)

Answer 2

Before: 0.yz After backwards incompatible changes: 1.yz Nothing else.