[chore] export package.json from adapters

[benmccann]

We always tell people they should export package.json, so we should probably follow our own advice 😄

[changeset-bot]

🦋 Changeset detected

Latest commit: 7fc79b3

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

Name	Type
@sveltejs/adapter-begin	Patch
@sveltejs/adapter-cloudflare-workers	Patch
@sveltejs/adapter-netlify	Patch
@sveltejs/adapter-node	Patch
@sveltejs/adapter-static	Patch
@sveltejs/adapter-vercel	Patch

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[jthegedus]

What's the motivation for this? I apparently have never read any of the "We always tell people" conversations.

[benmccann]

If you don't export package.json then tooling can't access it. There's some tooling like rollup-plugin-svelte that tries to access the package.json of every package (e.g. to determine if it's a Svelte package in that case) and you will get an error if it's not exported