Generate and report coverage

.gitignore

@@ -1,3 +1,4 @@
+.nyc_output
 lib
 node_modules
 *.log

.travis.yml

@@ -15,3 +15,4 @@ addons:
       - libgif-dev
       - libjpeg8-dev
       - libpango1.0-dev
+after_success: npm run report-coverage

package.json

@@ -8,9 +8,11 @@
   ],
   "scripts": {
     "compile": "babel ./src --out-dir ./lib",
+    "coverage": "nyc npm test && nyc report --reporter=text-lcov",
     "lint": "eslint .",
     "prepublish": "npm run compile",
     "preversion": "npm run test",
+    "report-coverage": "npm run coverage | coveralls",
     "test": "npm run lint && mocha --compilers js:babel-core/register",
     "travis": "npm run compile && npm run test"
   },
@@ -40,12 +42,14 @@
     "babel-preset-react": "6.5.0",
     "canvas": "1.4.0",
     "common-tags": "1.3.1",
+    "coveralls": "2.11.12",
     "eslint": "2.9.0",
     "eslint-config-onelint": "1.1.0",
     "eslint-config-onelint-react": "0.0.3",
     "eslint-plugin-react": "4.3.0",
     "jsdom": "9.4.1",
     "mocha": "2.5.3",
+    "nyc": "7.1.0",
     "raf": "3.2.0",
     "react": "15.2.1",
     "react-addons-test-utils": "15.2.1",