Fix return type of D1PreparedStatement.all

[sdnts]

D1Result's generic parameter expects the type of a single item.

The type of result in the code below is D1Result<User[]>

type User = { id: string }
const result = ctx.d1.prepare("SELECT * FROM users").all<User>()

This means that the type of result.results actually ends up being User[][] instead of User[].

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 0078f5be4dc8cf89e723726f9ebd0cbdac70bfd8

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

This PR includes changesets to release 1 package

| Name | Type | | ------------------------- | ----- | | @cloudflare/workers-types | Patch |

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[sdnts]

cc @mrbbot