CRA does not check for presence of emitDeclarationOnly in tsconfig

Created by: entropitor

See https://github.com/facebook/create-react-app/issues/9373

CRA adds noEmit: true which conflicts with emitDeclarationOnly: true as a tsconfig setting but this would be a fine setting for CRA so CRA should check if emitDeclarationOnly: true and in that case not add noEmit: true