fix: Prevent readFragment from falling back to any return types

[kitten]

Resolves #215

Summary

This prevents readFragment(data) from falling back to any as a return type when no generic was passed. It also prevents readFragment(document, data) to evaluate to any when an invalid document is passed. This already errored previously on the document argument, but now also prevents any from being returned.

Set of changes

• Prevent readFragment<DocumentType>(data) from evaluating to any when DocumentType is left out
• Prevent readFragment(document, data) from evaluating to any, instead falling back to unknown on invalid inputs

[changeset-bot]

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Latest commit: 1f0b480

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