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

# example.com/basic/b
## incompatible changes
package removed

# summary
Suggested version: v0.2.0