Constructors are not checked for gaps, and not listed.

[teoli2003]

Investigate why the constructor PopStateEvent() is not listed as a gap.

• Everybody implements it (See the BCD table here: https://developer.mozilla.org/en-US/docs/Web/API/PopStateEvent )
• PopStateEvent.state is also implemented by everybody, and is listed, as expected, as a gap (meaning the spec is read).

[teoli2003]

I also found SpeechSynthesisEvent() is not reported.

It looks like constructors are not checked, and listed.

[teoli2003]

Thanks for the fix! It works well. I found 11 interoperable constructors to document (6 this Quarter)