mod=example.com/basic
version=v0.1.2
base=v0.1.1
release=v0.1.2
proxyVersions=example.com/basic@v0.1.1
-- want --
example.com/basic/a
-------------------
Incompatible changes:
- A2: removed

example.com/basic/b
-------------------
Incompatible changes:
- package removed

v0.1.2 is a valid semantic version for this release.