message: Update README.md
  Updated readme following 1.24 release
diff: [![Build Status](https://travis-ci.org/xd009642/tarpaulin.svg?branch=master)](https://travis-ci.org/xd009642/tarpaulin) [![Latest Version](https://img.shields.io/crates/v/cargo-tarpaulin.svg)](https://crates.io/crates/cargo-tarpaulin) [![License:MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
  -**Tarpaulin is currently not working on rustc 1.23 stable
  -in rustc, this was fixed in nightly-2018-01-05 so use an appropriate release in
  -the interim**
  -
  Tarpaulin is designed to be a code coverage reporting tool for the Cargo build
  system, named for a waterproof cloth used to cover cargo on a ship. Currently,
  tarpaulin provides working line coverage but is still in the early development
  @@ -201,6 +197,9 @@ Issues, feature requests and pull requests are always welcome! For a guide on
  how to approach bugs found in Tarpaulin and adding features please check
  [CONTRIBUTING](CONTRIBUTING.md).
  +Rust 1.23 introduced a regression in the compiler affecting tarpaulin's
  +accuracy. If you see missing lines or files, check your compiler version.
  +
  ## Roadmap
  - [x] Line coverage for tests
  