Support Yarnlock v2

Currently this library supports only Yarnlock v1.

With v2 lockfile, we see an error as such: https://gitlab.com/gitlab-org/gitlab-ui/-/jobs/1226398396

Phase 1

Skip v2 lockfile with exit code 0 regardless of tamper or breaking of it: !16 (closed)

Phase 2

Verify v2 lockfile with exit code 0 if tampered or broken: TBD

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It looks like that we do not need to use any third-party library to support v2 lockfile.

https://www.npmjs.com/package/@yarn-tool/detect-yarnlock-version can be used for the detection of the version...