tokio: update to mio 0.7

[carllerche]

Mio 0.7 is not yet released. The tokio master branch should depend on the mio master branch and track changes.

[Razican]

Hello, is there news on this regard?

[carllerche]

It is a goal for 0.3, which should be sometime next month. There are still some windows issues to work through.

[galich]

Current version of tokio refers to winapi 0.3 and mio 0.6, which refers to winapi 0.2. We have 2 versions of fairly large winapi crate to build every time.

@carllerche is there any specific issue we can try and help with to make mio 0.7 used in tokio faster?

[Emilgardis]

mio 0.7.0 is now released. tokio-rs/mio#1279
Is there a timeline done for this?

[Stammark]

+1 for this from me!

Although to resolve winapi issues, the mio-named-pipes dependency would also have to be updated, too, probably (?) (see bbqsrc/mio-named-pipes#7).

edit: Thank you @Darksonn , sorry I hadn't spotted the other issue!

[Darksonn]

Regarding mio-named-pipes: #2547

[Darksonn]

oops