feat(scripts): adds prepublishOnly script

Author: bkrem

package.json

@@ -24,6 +24,7 @@
     "coveralls": "cat ./coverage/lcov.info | coveralls",
     "show:cov": "open coverage/lcov-report/index.html",
     "show:docs": "open docs/index.html",
+    "prepublishOnly": "npm run test && npm run build",
     "deploy:demo": "npm run build && npm run build:docs && cd demo && npm run build && npm run deploy"
   },
   "repository": {