Release protocol: bump the minor for breaking changes while 0.x
Match the release tooling change (facebook/astryx#4264): a [breaking]
changeset now bumps the minor (0.x.y -> 0.(x+1).0, the breaking tier
under caret ranges) and everything else bumps the patch. Update the
0.x semver rule, the changeset bump table, the [breaking] example, and
the Distribution versioning section accordingly.