Add explicit API to toggle development/production mode (WAS: process is not defined)

ReferenceError: process is not defined

> 182 | var isDevelopmentMode = process !== undefined && process !== null && typeof process === 'object' &&
  183 |     process.env !== undefined && process.env !== null && typeof process.env === 'object' &&
  184 |     process.env.NODE_ENV === 'development';
  185 | var self = Symbol('self');

I looked in the index.es.js file and process is never defined, when I set it to true or false everything works fine.

[avkonst]

implemented in Hookstate 4.0.0-rc7

[avkonst]

please keep it open, as it is a feature I still want to add