Dispatch and Listen in javascript

[projectitis]

Callbacks (Dispatcher) is failing in javascript. Investigate communication between c++/js and resolve. May need specific solutions for c++ vs JS implementations.

[projectitis]

There are two known issues:

1. Event properties are being interpreted as the incorrect type. It looks like this is because of the virtual destructor (but not sure how). See Binding a callback (std::function) causes runtime error ftk/quickjspp#31 (comment)

2. An exception occurs when the event is added to the std::list in Dispatcher::listen. It looks like this is because the pointer to the list changes between ctor and calling listen (once again, no idea why).

Both of these issues only occur when calling listen via javascript, and work perfectly fine in pure c++.