Update toml, regex and xml-rs version

[EPashkin]

Updating to new last toml as rustc-serialize planed for deprecation https://internals.rust-lang.org/t/rust-release-milestone-predictions/4591
Only last is docopt that also planing use serde docopt/docopt.rs#128

PS. There was problem with sys crates toml-rs/toml-rs#151
PPS. When upgrading found that regex 0.2.0 don't implement Eq so this code fails and upgrade will need other PR later (if any).

#[derive(Clone, Debug, Eq, PartialEq)]
pub enum Ident {
    Name(String),
    Pattern(Regex),
}

[EPashkin]

Fixed regex update

[EPashkin]

Upgraded xml-rs

[EPashkin]

@GuillaumeGomez I merge PR tomorrow if you do not see the problems

[GuillaumeGomez]

I'm clearly not a big fan of this. Also, we won't be able to publish we use '*' (even if we don't care).

[EPashkin]

Change to "0.2" and add version for others *?

[GuillaumeGomez]

Yes please. At least we'll have a bit more control over dependencies.

[GuillaumeGomez]

Except for my comment, I'm 100% 👍

[EPashkin]

Done.
Also upgraded git2 with removing unneeded features

[EPashkin]

Not sure that we really needed same build-dependencies

[EPashkin]

Was wrong about build-dependencies forgot that it

[GuillaumeGomez]

Ok. So like I said, it's good for me. Merge when you want to.

[EPashkin]

Removed unneeded into_owned
Will merge tomorrow