Apollo Client Error Template

See pr2513: apollographql/apollo-client#2513

to test

• npm run start
• Click REFETCH WITH ERROR
• click REFETCH WITH DATA

result

• error not cleared on a successful refetch result
• loading not updated while doing a refetch
• people data not set to undefined on error^

^ data is cached? note that fetchPolicy is network-only so it shouldn't cache I would think