Set up coverage

Author: carlobeltrame

.travis.yml

@@ -6,3 +6,4 @@ node_js:
   - "node"
 install: "npm install"
 script: "npm run test"
+after_success: "npm install -g coveralls && npm run coverage && cat ./coverage/lcov.info | coveralls"

package-lock.json

@@ -6,6 +6,7 @@
   "scripts": {
     "build": "cross-env NODE_ENV=production webpack",
     "clean": "cross-env rimraf dist coverage lib",
+    "coverage": "cross-env npm run build && jest --coverage",
     "lint": "cross-env eslint src --ext .js",
     "test": "cross-env npm run build && jest"
   },