Bump version to 0.10.0-pre

Author: asomers

CHANGELOG.md

@@ -3,6 +3,8 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unreleased]
+
 ## [0.9.0] 2017-07-23
 
 ### Added

Cargo.toml

@@ -2,7 +2,7 @@
 
 name        = "nix"
 description = "Rust friendly bindings to *nix APIs"
-version     = "0.9.0"
+version     = "0.10.0-pre"
 authors     = ["The nix-rust Project Developers"]
 repository  = "https://github.com/nix-rust/nix"
 license     = "MIT"
@@ -15,7 +15,7 @@ exclude     = [
 ]
 
 [dependencies]
-libc = "0.2.25"
+libc = { git = "https://github.com/rust-lang/libc" }
 bitflags = "0.9"
 cfg-if = "0.1.0"
 void = "1.0.2"