Another instance of using semver trick: avoiding linking errors

[Kixunil]

First of all, thanks for the awesome idea! I used it to avoid linking issues where one crate moved FFI to a separate crate and also bumped version. So when the depending crates were using different versions it duplicated the symbols.

I was thinking it might be worth mentioning it as another interesting use of the semver trick. What do you think?

[dtolnay]

I am not going to include this in the writeup in this repo, but thanks for sharing!