Remove the runtime dependency

[diegofrata]

Another idea is to remove the runtime dependency, especially for those who don't use custom Comparers. They can be delivered explicitly (with global:: full typepaths to avoid possible collisions).

Originally posted by @HavenDV in #22 (comment)

[diegofrata]

I don't see much gain in removing the runtime dependency only for cases without custom comparers, to me this is either all or nothing -- either we move all comparers to be source generated and get rid of the runtime dependency at all or we don't. It's a sizeable piece of work.

[HavenDV]

The main problem is that the Runtime package has a dependency:

<PackageReference Include="Microsoft.Bcl.HashCode" Version="1.1.0" />

[diegofrata]

This has been removed from 3.0 as it caused issues in packages with InternalsVisibleTo. Needs to rethink the approach.