Update gargoyle please

[ilyaZar]

Hi @ColinFay

please consider an update of gargoyle with the current PR's or at least merging #18 if otherwise it takes too much time.

I need this #18 fix in an app I am working now, otherwise I'd have to use gargoyle with the app on my fix branch or consider some esoteric workarounds for the control flow (it uses a different session in the whole shiny::module(), it's complicated and it would cost quite some time to unwrap the trigger/watch mechanisms already implemented).

Also, the current PR's are rather small and straightforward, let me know if I can help ... the update would be very much welcome and I'd be super happy if you could find the time.