fix(@clayui/date-picker): update date-fns to v4

[bryceosterhaus]

We are going to update date-fns to v4 in liferay-portal and realized we should also update it in clay

Let me know if you see any issues with this.

[bryceosterhaus]

hmm, there seems to be issues with Jest and ESM, which is the default way date-fns is shipped.

Does it make sense to update clay to be pure ESM?

[matuzalemsteles]

Thanks Bryce!

hmm, there seems to be issues with Jest and ESM, which is the default way date-fns is shipped.
Does it make sense to update clay to be pure ESM?

@bryceosterhaus I don't see any problem in doing that.

[bryceosterhaus]

@matuzalemsteles I updated this PR to also include a "dual build" for esm and cjs.

I didn't actually test with npm publishing, but just wanted to send it for you to take a look and see.

With this change you can probably remove a whole host of babel dependencies

[matuzalemsteles]

Thanks @bryceosterhaus. Can I put this on hold for a bit? I'm thinking about putting this on hold for a bit before the PR #5780, it's already in the final stages and I've made a lot of changes... I think this could cause some problems there so I wanted to wait until merged it and work on it. Does that make sense to you?

[bryceosterhaus]

Yep! Feel free to put this on hold, I just at least wanted to get something over to you to see and be able to test out. The date-fns update will be merged relatively soon on the portal side, but I believe that should be be fine.

[bryceosterhaus]

FYI. I think we are actually just going to remove date-fns in favor of Intl.DateTimeFormat