Update deps

[chpio]

• enable some non-idiomatic lints
• enable edition 2018
• updates cargo (enables editions)
• fmt (dunno if this is maybe wrong, i'm using nightly fmt)

[chpio]

ups rust v1.31 isn't out yet

[Cogitri]

Rust 1.31 has been published today.

[svenstaro]

Can you go up to cargo = "0.32.0" now?

[Cogitri]

wfm, thanks.

[Amanieu]

@kbknapp ping

[sunjay]

ping @Frederick888 since you seem to also have the ability to publish a new version of this crate. :)

[bbigras]

while we wait:

cargo install -f \
--git https://github.com/chpio/cargo-outdated.git \
--rev e7229dc97e80692774574b0d6172d67de6ad1ea7 \
cargo-outdated

[dpc]

Please land! :D

[kornelski]

Thanks @chpio!

[aldanor]

v0.7.2?

[kornelski]

#153