Fix issue with errors in function values crashing hydra

[rumblesan]

So I had a quick look into issue https://github.com/ojack/hydra/issues/51 on the hydra repo that @zachkrall tagged me in.
As best I can tell, the problem is that whilst all the javascript that gets evaluated is within a try/catch block, any functions passed in as arguments don't get run within this and so errors won't get caught.

I think this change will fix it by adding try/catch statements around the functions when they're run, but I'm not actually able to build hydra-synth for some reason and so don't know yet 😅

I'll see about having another go later today, but thought I'd throw this up here now.

[ojack]

yes! this fixes it. (i do dev by running 'npm run example' and it automatically builds.) need a better way of logging this error to the user in the editor version, i am going to open another issue for that.

[rumblesan]

so when I run npm run example I'm getting the server running, but then when I browse to the page I'm getting an error
Cannot find module 'webrtc-adapter'

Glad that this fixes the issue though. I've been meaning to get back digging into the synth, but there's only so many hours in the day hah