Add missing release script to package.json

[derberg]

The package is still not properly released.
It is because after migration to TS we forgot that we need to make sure proper lib/index.js code is produced during the release. In other words in current release script we do not run npm run build

Fix is to add below script to package.json:
"prepublishOnly": "npm run build"

[derberg]

@toukirkhan hey, letting you know, in case you are still interested in helping here as part of hacktoberfest, and maybe beyond

[toukirkhan]

@derberg sure I will try to solve this.

[KeneePatel]

So, Do I just need to add "prepublishOnly": "npm run build" in package.json and under the "scripts" section and make a pr ? @derberg

[derberg]

hey folks, @aeworxet just opened a PR as this is important fix that is affecting users