Allow packageInfo to be undefined

[emonadeo]

Fixes #1563.

IIRC, the name is only relevant for packages that publish to npm (#20).
This PR relaxes that requirement.

[changeset-bot]

🦋 Changeset detected

Latest commit: a371e2e

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

This PR includes changesets to release 9 packages

Name	Type
@vanilla-extract/jest-transform	Patch
@vanilla-extract/webpack-plugin	Patch
@vanilla-extract/integration	Patch
@vanilla-extract/vite-plugin	Patch
@vanilla-extract/compiler	Patch
@vanilla-extract/next-plugin	Patch
@vanilla-extract/esbuild-plugin	Patch
@vanilla-extract/parcel-transformer	Patch
@vanilla-extract/rollup-plugin	Patch

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[baetheus]

Heya @emonadeo do you have time to resolve these conflicts or would you rather I take it over and try to get it pulled?

[emonadeo]

Heya @emonadeo do you have time to resolve these conflicts or would you rather I take it over and try to get it pulled?

Thanks for letting me know. Rebased onto master.