add standard-version and release script

Author: watilde

CHANGELOG.md

@@ -11,8 +11,9 @@
     "test": "npm run lint && karma start",
     "build": "npm run scripts",
     "postbuild": "npm install --progress=false",
+    "release": "standard-version",
     "lint": "standard src/*.js lib/index.js scripts/*.js",
-    "scripts": "node scripts/refresh.js && node scripts/build.js"
+    "scripts": "node scripts/refresh.js && node scripts/build.js",
   },
   "repository": {
     "type": "git",
@@ -36,6 +37,7 @@
     "power-assert": "^1.4.1",
     "rimraf": "^2.5.2",
     "standard": "^7.0.1",
+    "standard-version": "^2.2.1",
     "uglify-js": "^2.6.2"
   },
   "peerDependencies": {