Add update command

[baszalmstra]

Add a command to update one or more dependencies in the pixi.lock file without updating the project file. If the lock file is missing, one will be created.

[ruben-arts]

Yes very nice! I think it could really nice if it could accept package names (+ versions). Which would update a package and only its dependencies with it. So you can have minimal updates.

[baszalmstra]

Yeah I think we'de have to implement minimal lock file updates for this to work anyways.

• Incremental lockfile updates #4

[beenje]

It would also be very nice to be able to update the global packages installed with pixi global install, like pipx upgrade and pipx upgrade-all.

[ruben-arts]

He @beenje,
I think this could be helpful for the user as well.

Currently it is easiest for the user to run "pixi global install PACKAGE" again to just update to the latest version. or pixi global install "PACKAGE==1.2.3" if they want a specific version.

[dhirschfeld]

It would also be very nice to be able to update the global packages installed with pixi global install, like pipx upgrade and pipx upgrade-all.

I came here exactly to ask for a pixi global update-all (or similar). Having to manually update each package individually would be quite painful.

[pavelzw]

It would be nice to have an option with --json that outputs the diff in JSON. This could maybe help with a dependabot/renovate implementation.

[pavelzw]

#909

And pixi upgrade

[baszalmstra]

This requires #1320