add coverage

.travis.yml

@@ -4,3 +4,4 @@ node_js:
   - 'stable'
   - '0.12'
   - '0.10'
+after_success: npm run coveralls

package.json

@@ -23,7 +23,8 @@
     "unzip-response": false
   },
   "scripts": {
-    "test": "xo && ava"
+    "test": "xo && ava",
+    "coveralls": "nyc report --reporter=text-lcov | coveralls"
   },
   "files": [
     "index.js"
@@ -61,7 +62,9 @@
   },
   "devDependencies": {
     "ava": "^0.2.0",
+    "coveralls": "^2.11.4",
     "into-stream": "^2.0.0",
+    "nyc": "^3.2.2",
     "pem": "^1.4.4",
     "pify": "^2.2.0",
     "tempfile": "^1.1.1",

readme.md

@@ -8,7 +8,7 @@
 
 > Simplified HTTP/HTTPS requests
 
-[![Build Status](https://travis-ci.org/sindresorhus/got.svg?branch=master)](https://travis-ci.org/sindresorhus/got)
+[![Build Status](https://travis-ci.org/sindresorhus/got.svg?branch=master)](https://travis-ci.org/sindresorhus/got) [![Coverage Status](https://coveralls.io/repos/sindresorhus/got/badge.svg?branch=master&service=github)](https://coveralls.io/github/sindresorhus/got?branch=master)
 
 A nicer interface to the built-in [`http`](http://nodejs.org/api/http.html) module.