mod=example.com/basic/v2
base=example.com/basic
version=v2.1.0
release=v2.1.0
proxyVersions=example.com/basic@v1.1.2
-- want --
example.com/basic/a
-------------------
Compatible changes:
- A2: added

example.com/basic/v2/b
----------------------
Compatible changes:
- package added

Inferred base version: example.com/basic@v1.1.2
v2.1.0 is a valid semantic version for this release.