Create shorthand isRefetching for QueryResults

[evandrmb]

Is your feature request related to a problem? Please describe.
Currently, the following functions fetchMore, fetch and refetch trigger the isLoading variable, and user's need to validate whether there's data or not. Sometimes we need the screen to behave differently from each case, so a shorthand like isRefetching would be handy.

Describe the solution you'd like
Add isRefetching param to QueryResult

Additional context
I believe there's much influence from react-query in this package therefore would be a good idea since they separate each behavior in multiple variables (isFetching, isRefetching...). That also shouldn't be a breaking change as it's only a shorthand for validation users already do.