fix(react): fix package.json types

[hi-ogawa]

Description

• Closes No default export when using "moduleResolution": "node" in 4.4.0 #460

This types field is only used by (mostly deprecated) moduleResolution: "node". index.d.ts was same as index.d.mts previously, but unbuild 3.5.0 changed something and it's now index.d.cts for some reason. Making a quick fix to just point to index.d.mts to preserve old ts behavior.

Technically this should be reported and fixed on unbuild, but this types fields are only for back compat for ancient config, so quick fix on our side seems fine.

I locally confirmed the repro is fixed with local override.

[ArnaudBarre]

I'm not really good at this madness of dual package, if it does not affect other module resolutions it should be a safe change then. Tagging the expert @bluwy

[bluwy]

unbuild 3.5.0 changed something and it's now index.d.cts for some reason.

Haven't tested, but I noticed plugin-react 4.4.0 adds "type": "module" which changes how .d.ts gets evaluated. So that might've affected the output.

But anyways, I think this change is ok for compatibility. It changes the evaluation type from CJS to ESM (previous 4.3.4 evaluates as CJS), but this field is only used by moduleResolution: "node" which iirc doesn't care about evaluation type anyways.

The side-effect of using .d.mts though is that it's only supported since TypeScript 4.7, but it's an older release now and shouldn't affect most setup (similar bombshell-dev/clack#253)