Expose PuppeteerExtraPluginRecaptcha error

[markcellus]

Resolves #740 by updating the PuppeteerExtraPluginRecaptcha thrown error and exposes all of its properties to be evaluated by consumer code.

[markcellus]

Perhaps a better way to do this is to create a new error class that extends Error (e.g. PuppeteerExtraPluginRecaptchaError) and just throw that. But I'm not too sure if that would be acceptable here.

[berstend]

Yeah, the error handling isn't optimal 😄
From a quick look it seems that a response.error can be a string or an Error (in which case wrapping it again in an error would cause the info to get lost)

I wonder if this would work as a fix as well:

if (this.opts.throwOnError && response.error) {
  throw !!response.error?.message ? response.error : new Error(response.error)
}