feat(version): add --signoff git flag

[petermetz]

Signed-off-by: Peter Somogyvari peter.somogyvari@accenture.com

Description

Provide a CLI flag to enable signing off on the git commits made by lerna version.
Currently this is not supported, only gpg signatures are, which is a different thing entirely despite the very similar sounding name.
https://stackoverflow.com/a/64840893/698470

Motivation and Context

When issuing releases on a project I help maintain, there's a check for DCO and this currently cannot be satisfied unless you manually jerry rig the commit after the fact, but this then leads to your npm packages being published with a revision of the code that you disappear right after with a force push while cleaning up.

How Has This Been Tested?

I didn't, the linter has 500+ errors so I couldn't run the tests locally. I was hoping the CI here would be set up to run the automated tests (which I did add so there is test coverage I just never ran it locally)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• [] All new and existing tests passed.

[ghiscoding]

hey guys if that interests you, I replicated this change in Lerna-Lite fork

[JamesHenry]

Thank you very much for this @petermetz! I'm sorry it sat in limbo for so long while the project went through a transitional period

[petermetz]

Thank you very much for this @petermetz! I'm sorry it sat in limbo for so long while the project went through a transitional period

@JamesHenry No worries at all, I know how hard it is to be a maintainer sometimes! Very much appreciated that you came around to it eventually, regardless of how much time it took!