Make GlobalRegistrator registered info public

[infodusha]

Is your feature request related to a problem? Please describe.
I want to know if globals have already been applied

if (!GlobalRegistrator.registered) {
  GlobalRegistrator.register({
    settings: {
      disableJavaScriptEvaluation: true,
      disableJavaScriptFileLoading: true,
      disableComputedStyleRendering: true,
    },
  });
}

Describe the solution you'd like
I see it as a static getter isRegistered on GlobalRegistrator class but will be glad to see any solution to my problem.

Describe alternatives you've considered

1. I could check if window is already defined but that could be a different window, other that from happy-dom
   Also AFAIK typeof window === undefined check could be eliminated as a dead code with some bundlers.

2. The other alternative is to check .registered with @ts-ignore, but that is a code smell.

[capricorn86]

@infodusha sounds like a good idea and a an easy fix 🙂

[capricorn86]

Support for this is available in v16.5.0