DEPRECATED_ES5 runtime required?

[viktorbrech]

Thank you for writing this app and open-sourcing it.

I notice it uses the ES5 runtime as per its appsscript.json .

Wondering if anything is expected to break if I change this to V8. The reason is that I use this code in conjunction with a script of my own (i.e. inside the same project), which requires V8.

Thanks!

[evbacher]

Current code seems to run fine in V8, just a lot slower (not sure exactly why though).