(WIP) yarn exits with an error when a dependency has no latest tag #6017
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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.