fix an error when there is a package.json but no repo url

[fharper]

No description provided.

[waldyrious]

I might be missing something, but how exactly does the new code behave differently than the current one?

[fharper]

The initial code is throwing a TypeError: Cannot read property 'url' of undefined if repo doesn't exist as it's accessing url. My small change is checking if repo exist before verifying if url also exists and use it if it's the case.

[waldyrious]

Ah, right, right. That's what I get for reading code late at night! 😅 Thanks for clarifying.