fix(graphql): allow null for "data" and "errors" response property types

[kettanaito]

Currently, providing null as the value of data or errors properties on the mocked GraphQL response causes a TypeScript error. That's because the types for those properties don't have the union with null:

msw/src/core/handlers/GraphQLHandler.ts

Lines 52 to 55 in 28efd32

	export interface GraphQLResponseBody<BodyType extends DefaultBodyType> {
	data?: BodyType
	errors?: readonly Partial<GraphQLError>[]
	}

This also makes them incompatible with the ExecutionResult from the graphql package.

[kettanaito]

Released: v2.0.8 🎉

This has been released in v2.0.8!

• 📄 Release notes
• 📦 npm package

Make sure to always update to the latest version (npm i msw@latest) to get the newest features and bug fixes.

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