Issue #12 suggestion - add root and visibleOffset to useEffect deps

[pklingman]

Issue: #12

This is a great library! I think this PR would be helpful for one of our use cases for two main reasons, and also adding these props to the dependencies array follows the rule of hooks:

1. Currently root must be defined on the first render or it will always be null - this allows root to be defined on subsequent renders. Using an element that is not available in the DOM on the first render is something we are currently doing.
2. If root is null, then rootMargin in the intersection observer library is not applied

[zzynx]

Good fix.
I made my own MyRenderIfVisble component by copying the code of the current render-if-visible.tsx and applied your changes to it. That works fine.

Btw,
eslint also suggested me to add those dependencies.
So indeed, adding these props to the dependencies array follows the rule of hooks.

[VenyaBrodetskiy]

@pklingman I had to make same changes for my project for same reason.
Could you please @GusRuss89 approve and merge this PR? Currently I can't use your package in my project, this PR would fix the issue.
Thank you!