[meta] Known suspense-only issues

[trojanowski]

There are some known suspense-only issues which I tried to solve but decided to wait until Suspense for data fetching is considered ready by the React team - maybe they'll be less hacky to fix after that. Feel free to create a PR if you need them fixed right now.

• only the cache-first fetch policy is supported (Using fetchPolicy: 'cache-and-network' creates infinite loop #13, WIP: Allow to use 'cache-and-network' fetch policy with suspense #15)
• networkStatus returned by useQuery is undefined (WIP: feat(useQuery): forward networkStatus #68)