feat(nodejs): add pnpm support

[mycodeself]

Description

This PR aims to add support for pnpm added in aquasecurity/go-dep-parser#106

Related issues

• Close pnpm support #1200

Checklist

• I've read the guidelines for contributing to this repository.
• I've followed the conventions in the PR title.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

[knqyf263]

Looks like it has been almost done, so I've merged it. Thanks for your great contribution!

[mycodeself]

@knqyf263 oh thank you! The integration test was failing and I planned to review it later today, also I have locally some changes ready in the documentation to update it. I'll open new PR when I have some time!!

[knqyf263]

Oh, I completely forgot the documentation. Thanks for the good catch!

[06kellyjac]

looking forward to this making a release :) thanks @mycodeself

[ManAnRuck]

Hi I am new here. Is https://aquasecurity.github.io/trivy/v0.22.0/vulnerability/detection/language/ missing the the pnpm lockfile on this page?

[knqyf263]

You are referencing v0.22.0. Please see the latest version.
https://aquasecurity.github.io/trivy/v0.51/docs/coverage/language/nodejs/