add release script

Author: timhaywood

package.json

@@ -15,7 +15,8 @@
  "access": "public"
  },
  "scripts": {
- "test": "echo \"Error: no test specified\" && exit 1"
+ "test": "echo \"Error: no test specified\" && exit 1",
+ "release": "np"
  },
  "keywords": [
  "cli"