[Feature Request] Expose BaseSemVer as Output Variables

[jakublatkowski]

Expose BaseSemVer in the output variables so CI pipelines can reference the base version.

Context

Some systems (e.g., SonarCloud) use semantic versioning to compare incremental code coverage. They require the previous (base) version to generate accurate incremental coverage reports.

Possible Implementation

Include BaseSemVer alongside existing version fields in the standard outputs (environment variables, JSON output, and any other supported output channels), enabling CI pipelines to consume it directly.

Motivation

Simplifies integrations that need the base version, avoiding custom parsing or brittle workarounds.

Contribution

I already have changes in my fork and I’m happy to open a PR if this addition is considered valuable.

[arturcic]

@jakublatkowski I guess we could at least have a look on a draft PR and understand better the motivation behind the changes