Add code coverage

.travis.yml

@@ -9,3 +9,5 @@ node_js:
 script:
   - npm run lint
   - npm run test
+after_success:
+  - npm run coverage

README.md

@@ -7,6 +7,7 @@ Command line tool for generating a changelog from git tags and commit history
 [![Build Status](https://img.shields.io/travis/CookPete/auto-changelog.svg)](https://travis-ci.org/CookPete/auto-changelog)
 [![Dependency Status](https://img.shields.io/david/CookPete/auto-changelog.svg)](https://david-dm.org/CookPete/auto-changelog)
 [![devDependency Status](https://img.shields.io/david/dev/CookPete/auto-changelog.svg)](https://david-dm.org/CookPete/auto-changelog#info=devDependencies)
+[![Test Coverage](https://img.shields.io/codecov/c/github/cookpete/auto-changelog.svg)](https://codecov.io/gh/CookPete/auto-changelog)
 
 
 ### Installation

package.json

@@ -7,7 +7,8 @@
   },
   "scripts": {
     "lint": "standard --verbose | snazzy",
-    "test": "mocha test --compilers js:babel-core/register",
+    "test": "nyc mocha test --compilers js:babel-core/register",
+    "coverage": "nyc report --reporter=text-lcov > coverage.lcov && codecov",
     "clean": "rm -rf lib",
     "build": "babel src -d lib",
     "preversion": "npm run lint && npm run test",
@@ -50,7 +51,9 @@
     "babel-preset-env": "^1.6.0",
     "babel-preset-stage-0": "^6.3.13",
     "chai": "^4.1.2",
+    "codecov": "^2.3.0",
     "mocha": "^3.0.2",
+    "nyc": "^11.2.1",
     "snazzy": "^7.0.0",
     "standard": "^10.0.3"
   },