remove update command in nestjs v9

[micalevisk]

Is there an existing issue that is already proposing this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe it

taking this #1204 (comment)

We might need to remove the update command entirely soon as it isn't even close to a real "updating/upgrading" feature. I'd recommend using npx ncu -u instead (for updating deps).

I guess we can do that in v9 😄

Describe the solution you'd like

either

• drop the command update from @nestjs/cli and update the migration guide to clarify why,
• or display a deprecating warning message when nest update is being used, to finally remove it in v10

Teachability, documentation, adoption, migration strategy

it depends on which path above we will follow

What is the motivation / use case for changing the behavior?

people often complains about nest update not working as they expected it should, and I don't think the CLI need that feature because there are other tools for such task

[kamilmysliwiec]

Would you like to create a PR for this?