apollo-link-batch-http throws errors when token is invalid.

[kapilpipaliya]

Hello when server return json instead of array apollo-link-batch-http throws error.
see : https://github.com/apollographql/apollo-fetch/blob/master/packages/apollo-fetch/src/apollo-fetch.ts
we have to fix the server to send array here:
render json: FieldError.error("Auth token is invalid")
thank you.

[kapilpipaliya]

also we have to handle Token errors in client side (when token is expired), so user can re-login.
Thanks.