Function unsafe

Simply takes a payload and passes it to all the listeners.

While dispatching:

• This is an unsafe method if by chance any of the listeners modify the array.
• It cannot prevent changes to the payload.

Improving safety:

• Only use a local array that isn't exposed to the listeners.
• Use the dispatch method instead as it makes a arrayCopy of the listeners array.
• Freeze the listeners array so it can't be modified.
• Freeze the payload.

Specifying trap will catch any errors and pass them along if trap is a function. A payload is used instead of arguments for easy typing.