fix: transform json in deep import

[hannoeru]

fix: #1458

[yyx990803]

The test actually won't be testing the original bug because Vite only appends the version hash when the dep is in node_modules (this is to avoid caching locally linked packages which are likely to be source instead of actual deps)

[yyx990803]

I think the easy way to test it is simply adding an import to a non-optimized dep, e.g. @vue/runtime-core/package.json in the json playground.