Newly introduced dependency on hijri-converter prevents WebJar deployment

[jgosmann]

To reproduce

We consume react-day-picker as WebJar. Version 9.14.0 can no longer consumed this way because the dependency @tabby_ai/hijri-converter fails to deploy and is thus not available afterwards. This can be easily reproduced by clicking the "Add a WebJar" button on the WebJar website and choosing:

• WebJar Type: NPM
• Package Name: react-day-picker
• Version: 9.14.0

Then click "Deploy!" and wait for while. Eventually you'll get this error (more stuff will be printed afterwards):

Deploying Dependency: NPM @tabby_ai/hijri-converter 1.0.5
 
The metadata was missing a required field: /repository/url

Actual Behavior

Dependency @tabby_ai/hijri-converter is not deployed and react-day-picker can thus not be consumed as WebJar.

Expected Behavior

One of:

• @tabby_ai/hijri-converter deploys correctly as WebJar. Of course, this would not be a react-day-picker issue, but an upstream issue. It actually happens to have been fixed and would just require a new release. Unfortunately, I did not receive a reaction on my request to do such a release. Apparently, also a manual deploy with overridden repository URL would be possible on the WebJar side, but that request didn't receive any reaction either.
• Make the @tabby_ai/hijri-converter dependency optional in react-day-picker. We don't need hijri support and given the rise in supply chain attack, I would be quite happy to cut unnecessary dependencies.

Screenshots

[rodgobbi]

@jgosmann thanks for reporting! 👍

@gpbl I think this would be solved by doing #2910 (Move calendar plugins (Hijri, Persian, Buddhist, etc.) to separate packages)

But this is a breaking change, what do you think of implementing it for v10?