@testing-library/react linked as dependency

Hey there,

first of all this is a handy little wrapper around Web Share API, thanks for providing this!

During install I found that a surprising set of sub-dependencies were added to my `yarn.lock`. A closer look showed this in your packages' `package.json`:
https://github.com/agneym/react-use-web-share/blob/22f3e5028fe73f30df5e108eb687147248a851bc/package.json#L59-L61

Shouldn't it be listed under `dev-dependencies`?

Cheers!