update publish script

Author: Péter Hauszknecht

package.json

@@ -11,7 +11,8 @@
     "build:umd": "rimraf dist && rollup -c rollup.config.js && rollup -c rollup.config.prod.js",
     "build:w": "tsc -w",
     "test": "jest",
-    "test:w": "jest --watch"
+    "test:w": "jest --watch",
+    "pub": "npm run build && npm publish"
   },
   "files": [
     "lib",