Add real coverage indicator

.travis.yml

@@ -1,4 +1,4 @@
 language: node_js
 node_js:
   - "6.1"
-after_script: NODE_ENV=test istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec ./**/*.test.js && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage
+after_script: NODE_ENV=test istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec ./**/*.js && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage

package.json

@@ -9,7 +9,7 @@
   "scripts": {
     "test": "mocha --colors --reporter spec ./**/*.test.js",
     "test:watch": "npm test -- --watch",
-    "coverage": "istanbul cover _mocha ./**/*.test.js",
+    "coverage": "istanbul cover _mocha ./**/*.js",
     "lint": "eslint './options/**/*.js'",
     "precommit": "npm run lint"
   },