Bump version to 0.2.0 with MSRV of Rust 1.28.0

Signed-off-by: Paul Osborne <osbpau@gmail.com>

Author: posborne

.travis.yml

@@ -1,10 +1,7 @@
 language: rust
 rust:
-  - 1.2.0
-  - 1.3.0
-  - 1.4.0
-  - 1.5.0
-  - 1.6.0
+  - 1.28.0
+  - stable
   - beta
   - nightly
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sysfs-pwm"
-version = "0.1.1"
+version = "0.2.0"
 authors = ["Rust Embedded WG Linux Team <embedded-linux@teams.rust-embedded.org>",
            "Paul Osborne <osbpau@gmail.com>"]
 license = "MIT/Apache-2.0"

README.md

@@ -26,6 +26,11 @@ Then, add this to your crate root:
 extern crate sysfs_pwm;
 ```
 
+## MSRV (Minimum Supported Rust Version)
+
+This crate is guaranteed to compile on stable Rust 1.28.0 and up. It *might*
+compile with older versions but that may change in any new patch release.
+
 ## Example/API
 
 The main API consists of a Pwm struct with the following methods: