chore: Add code coverage report

Author: florian

.gitignore

@@ -1,4 +1,6 @@
 node_modules
 .idea
 dist
-lib
+lib
+coverage
+.nyc_output

.travis.yml

@@ -14,6 +14,7 @@ before_script:
 script: 
   - npm run test
 after_success:
+  - npm run report-coverage
   - npm run semantic-release
 branches:
   except:

package.json

@@ -4,7 +4,9 @@
   "description": "A React component to navigate horizontally between cards of same width",
   "main": "lib/index.js",
   "scripts": {
-    "test": "babel-tape-runner test/**.js",
+    "test": "nyc babel-tape-runner test/**.js",
+    "posttest": "nyc report --reporter=lcov",
+    "report-coverage": "cat ./coverage/lcov.info | codecov",
     "build": "BABEL_DISABLE_CACHE=1 NODE_ENV=LIB babel -d lib/ src",
     "dev": "BABEL_DISABLE_CACHE=1 NODE_ENV=LIB babel -d lib/ src -w",
     "example": "node webpack.example.js",
@@ -34,10 +36,12 @@
     "babel-preset-stage-1": "^6.5.0",
     "babel-tape-runner": "^2.0.1",
     "bootstrap": "^4.0.0-alpha.2",
+    "codecov.io": "^0.1.6",
     "css-loader": "^0.23.1",
     "cz-conventional-changelog": "^1.1.6",
     "extract-text-webpack-plugin": "^1.0.1",
     "html-webpack-plugin": "^2.16.0",
+    "istanbul": "^0.4.4",
     "node-sass": "^3.6.0",
     "react": "^15.0.1",
     "react-dom": "^15.0.1",