Add cargo-mutants under testing?

[sourcefrog]

I think cargo-mutants (https://github.com/sourcefrog/cargo-mutants) is pretty helpful for Rust testing. Would you like to bless it?

[djc]

This tool hasn't really become popular (yet). I think there must be other approaches to mutation testing in the ecosystem, are you aware of any? And if so, why is your tool better?

[sourcefrog]

Yes, see

https://github.com/sourcefrog/cargo-mutants/wiki/Compared

I'm not aware of any better mutation testing system for Rust.

[djc]

I find that writeup convincing, and it looks like cargo-mutants is at least not less popular than mutagen, so I think it might make sense to mention your tool on blessed.rs (note: I am not the maintainer). Maybe submit a PR?