Support callUse* functions from URQL (for vue) to be able to provide Client manually

[mlesin]

When I'm trying to call useQuery() outside setup function, like in router, for example, and it claims that I can't do that because it have no way to inject client outside setup.
But there is a different form of the same functions exists, called callUseQuery for useQuery, callUseMutation for useMutation and so on.
Even more, internally useQuery is just calling callUseQuery skipping any extra parameters like client:

exports.useQuery = function useQuery(e) {
  return callUseQuery(e);
};

So maybe it is better to generate functions using this 'call' form with optional parameters?
This way user would be able to inject client manually if needed.
Because for now, the only way to do that is to repeat generated function manually somewhere, which breaks all the profits of automatic code generation