Rerender triggered three times when dependencies change

[dharkness]

This may be related to #24. Whenever I change the dependencies, I get three rerenders where I only expect to see two.

Expected:

1. Change dependencies.
2. Render with isLoading === true, data === null
3. Render with isLoading === false, data === <new-result>

Actual:

1. Change dependencies.
2. Render with isLoading === false, data === <previous-result>
3. Render with isLoading === true, data === <previous-result>
4. Render with isLoading === false, data === <new-result>

I don't care so much about data containing the previous result, and changing just that to null with no additional changes would be bad. But why am I getting that first rerender which is a copy of the previous call result? I would expect calling the hook with changed dependencies to immediately return with isLoading === true.

To be clear, everything works okay. The downside is the additional no-op render due to the first result being identical to the previous result. I assume the fetch call has been made by that point, and yet the hook tells me it's not loading. Is there any way to avoid that (step 2 above)?