Add coveralls.io support

.travis.yml

@@ -10,6 +10,9 @@ node_js:
 before_script:
   - npm install -g gulp
 
+after_success:
+  - npm run coverage
+
 cache:
   directories:
     - node_modules

README.md

@@ -1,4 +1,5 @@
 [![ci](https://img.shields.io/travis/pegjs/pegjs.svg)](https://travis-ci.org/pegjs/pegjs)
+[![coverage](https://img.shields.io/coveralls/github/pegjs/pegjs.svg)](https://coveralls.io/github/pegjs/pegjs)
 [![release](https://img.shields.io/npm/v/pegjs.svg)](https://www.npmjs.com/package/pegjs)
 [![dev](https://img.shields.io/npm/v/pegjs/dev.svg)](https://github.com/pegjs/pegjs)
 [![bower](https://img.shields.io/bower/v/pegjs.svg)](https://github.com/pegjs/bower)

package.json

@@ -30,7 +30,8 @@
         "clean": "gulp clean",
         "test:impact": "node test/impact",
         "test:server": "node test/server/run",
-        "test": "nyc gulp"
+        "test": "nyc gulp",
+        "coverage": "nyc report --reporter=text-lcov | coveralls"
     },
     "devDependencies": {
         "babel-preset-es2015": "6.24.1",
@@ -39,6 +40,7 @@
         "babelify": "8.0.0",
         "browserify": "14.5.0",
         "chai": "4.1.2",
+        "coveralls": "3.0.0",
         "del": "3.0.0",
         "eslint-config-futagozaryuu": "3.7.x",
         "express": "4.16.2",
@@ -66,8 +68,8 @@
             "**/.eslintrc.js"
         ],
         "reporter": [
-          "text",
-          "text-summary"
+            "text",
+            "text-summary"
         ]
     }
 }