(WIP) yarn exits with an error when a dependency has no latest tag

[kpbl]

Summary
When a dependency package has no latest tag the commands yarn upgrade and yarn upgrade-interactive will throw the following error:
An unexpected error occurred: "Invalid Version: undefined".

This is because in method getOutdatedPackages of the class PackageRequest latest is undefined when no latest tag is found and the call to semver.lt(current, latest) throws an error.

I simply checked if latest is undefined before the call to semver.lt(current, latest) .

fixes #5955

Test plan
I did not know how to write a test for this because i have found no public package that did not has a latest tag. Any advice would be great.

[arcanis]

I did not know how to write a test for this because i have found no public package that did not has a latest tag.

How did it happen? Private registry?

Also, I think the fix would rather be the following (to avoid so that if there is no latest, then the dependency isn't marked as out of date rather than the opposite). What do you think?

const isDepOld = ({current, latest, wanted}) =>
      latest === 'exotic' || (semver.lt(current, wanted) || latest === undefined && semver.lt(current, latest));

[arcanis]

Cf comment

[arcanis]

Fixed with #6454