Add test coverage to ci build

Author: mattphillips

.travis.yml

@@ -1,3 +1,4 @@
 language: node_js
 node_js:
   - node
+after_success: 'npm run test:coveralls'

package.json

@@ -12,6 +12,7 @@
     "prepublish": "npm run build",
     "test": "mocha \"src/**/*spec.js\" --recursive --compilers js:babel-register",
     "test:coverage": "babel-node ./node_modules/.bin/babel-istanbul cover _mocha -- \"src/**/*spec.js\" --recursive --compilers js:babel-register",
+    "test:coveralls": "npm run test:coverage && cat ./coverage/lcov.info | ./node_modules/.bin/coveralls",
     "test:watch": "npm test -- -w"
   },
   "author": "Matt Phillips",
@@ -25,6 +26,7 @@
     "babel-preset-es2015": "^6.18.0",
     "babel-preset-stage-0": "^6.16.0",
     "chai": "^3.5.0",
+    "coveralls": "^2.11.15",
     "mocha": "^3.1.2",
     "mocha-each": "^1.0.3"
   },