Fix prepare bundle on Windows

[joshwooding]

Issue:

What I did

Stopped the entries being passed into tsup being made into absolute paths.

This fixed things for me locally but looking at the tsup docs entry always contains relative files:

How to test

• Is this testable with Jest or Chromatic screenshots?
• Does this need a new example in the kitchen sink apps?
• Does this need an update to the documentation?

If your answer is yes to any of these, please make sure to include it in your PR.

[ndelangen]

@joshwooding thank you for the contribution!

Why are absolute paths a problem? We're using path.join which should yield a proper absolute path on either platform?

Might be a bug in tsup rather.?

Because of the fact we're running these scripts in multiple working directories, it's easy to get mixed up.
Having absolute paths can remove some confusion.
I'd rather keep it and fix this upstream.

[joshwooding]

Thanks @ndelangen after some digging an alternative is to replace the windows path separators with Linux ones. Arguably the fix should belong in tsup but making this change unblocks us for now.

[ndelangen]

I can't get the CI to pass. I tried a few times.

I don't get why it's failing either. 😢