Browserify of rhea-promise for frontend only

[pradip-interra]

Is your feature request related to a problem? Please describe.
My client is Angular9(typescript). It's client only. Server is not in my control. So I would like to browerify the content such that
I can use it in browser only platform.

Describe the solution you'd like
A section in the README how to proceed with browerify the content.

Describe alternatives you've considered
rhea.js.

Additional context
This would be helpful for any clients only applications who are not running on a node server.

[woppa684]

This would indeed be really helpful. For Rhea itself it at least states that you should use the browserified version.