mod=example.com/basic/v2
base=example.com/basic@v1.1.0
version=v2.0.1
release=v2.0.1
proxyVersions=example.com/basic@v1.1.0
-- want --
example.com/basic/a
-------------------
Incompatible changes:
- A2: removed

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

v2.0.1 is a valid semantic version for this release.