* cleanup(platform): we don't need CGO anymore
Since go1.16, we have the `ios` port. So we can easily
disambiguate between ios and darwin.
This means we don't need to rely on CGO to correctly guess
whether we are on ios or darwin anymore.
So, now miniooni does not depend on a C compiler even
when you are not cross compiling.
* Update internal/platform/platform.go