migrate Makefile to npm scripts

Signed-off-by: Outsider <outsideris@gmail.com>

Author: outsideris

.travis.yml

@@ -11,4 +11,5 @@ install:
   - npm install
 
 script:
-  - make all
+  - npm run lint
+  - npm test

Makefile

@@ -23,6 +23,19 @@
     "Andrew Rhyne <rhyneandrew@gmail.com>"
   ],
   "license": "MIT",
+  "scripts": {
+    "lint": "xo",
+    "test": "npm run test:node && npm run test:browser",
+    "test:node": "istanbul cover _mocha -- test.js",
+    "posttest:node": "cat ./coverage/lcov.info | coveralls",
+    "pretest:browser": "npm run build",
+    "test:browser": "karma start --single-run",
+    "prebuild:debug": "mkdir -p dist && browserify --standalone debug -o dist/debug.es6.js .",
+    "build:debug": "babel -o dist/debug.js dist/debug.es6.js > dist/debug.js",
+    "build:test": "babel -d dist test.js",
+    "build": "npm run build:debug && npm run build:test",
+    "clean": "rimraf dist coverage"
+  },
   "dependencies": {
     "ms": "^2.1.1"
   },