doc: fix badges in readme

Author: zkat

Diff for: README.md

@@ -1,4 +1,4 @@
-# npm-lifecycle [![npm version](https://img.shields.io/npm/v/npm-lifecycle.svg)](https://npm.im/npm-lifecycle) [![license](https://img.shields.io/npm/l/npm-lifecycle.svg)](https://npm.im/npm-lifecycle) [![Travis](https://img.shields.io/travis/npm/npm-lifecycle.svg)](https://travis-ci.org/npm/npm-lifecycle) [![AppVeyor](https://ci.appveyor.com/api/projects/status/github/npm/npm-lifecycle?svg=true)](https://ci.appveyor.com/project/npm/npm-lifecycle) [![Coverage Status](https://coveralls.io/repos/github/npm/npm-lifecycle/badge.svg?branch=latest)](https://coveralls.io/github/npm/npm-lifecycle?branch=latest)
+# npm-lifecycle [![npm version](https://img.shields.io/npm/v/npm-lifecycle.svg)](https://npm.im/npm-lifecycle) [![license](https://img.shields.io/npm/l/npm-lifecycle.svg)](https://npm.im/npm-lifecycle) [![Travis](https://img.shields.io/travis/npm/npm-lifecycle/latest.svg)](https://travis-ci.org/npm/npm-lifecycle) [![AppVeyor](https://img.shields.io/appveyor/ci/npm/npm-lifecycle/latest.svg)](https://ci.appveyor.com/project/npm/npm-lifecycle) [![Coverage Status](https://coveralls.io/repos/github/npm/npm-lifecycle/badge.svg?branch=latest)](https://coveralls.io/github/npm/npm-lifecycle?branch=latest)
 
 [`npm-lifecycle`](https://github.com/npm/npm-lifecycle) is a standalone library for
 executing packages' lifecycle scripts. It is extracted from npm itself and