Bumps version to 0.4.0 (#45)

Due to minimum rust version bump.

Also fixes links to travis in the README.

Author: mdaffin

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "loopdev"
 description = "Setup and control loop devices"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Michael Daffin <[email protected]>"]
 license = "MIT"
 documentation = "https://docs.rs/loopdev"

README.md

@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.org/mdaffin/loopdev.svg?branch=master)](https://travis-ci.org/mdaffin/loopdev)
+[![Build Status](https://travis-ci.com/mdaffin/loopdev.svg?branch=master)](https://app.travis-ci.com/github/mdaffin/loopdev)
 [![crates.io](https://img.shields.io/crates/v/loopdev.svg)](https://crates.io/crates/loopdev)
 
 # loopdev