Use tokio UnixStream / NamedPipeClient API instead of parity-tokio-ipc

[sdroege]

Fixes #49

Licensing: The code contributed to nvim-rs is licensed under the MIT or
Apache license as given in the project root directory.

[KillTheMule]

Hey, thanks for that! We can let CI handle the windows part, no biggie. The current failures seem unrelated to this PR, I'd see if I can fix this on master and then you can rebase. Might leave some comments, but first lets get CI running properly :)

[sdroege]

Thanks, Windows is passing fine now. Linux/macOS CI failures are indeed unrelated, as you say. Let me know when to rebase :) Thanks for looking into that!

[sdroege]

Also for Linux, I'm using this with nvim-gtk so it should be working fine.

[KillTheMule]

Ok, if you could put in those links I'd be grateful, afterwards (after rebasing to master) CI should be green. Thanks again!

[sdroege]

Should be OK now

[sdroege]

If you can make a 0.7.1 release with this change that would probably make some people happy :)

[KillTheMule]

I will be going with 0.8 since I also updated the neovim API (and dependencies).

[KillTheMule]

It's 0.9 now because cargo publish is confusing for me :( Still, I don't see myself yanking this just because I skipped 0.8, so I guess we'll roll with it.