listeners not called if no callback is given for a request

[Abhishek Banerji]

Debug adapter definition and debug configuration

dap.listeners.after.disconnect.user = function(session, error, response, payload) print("ON DISCONNECT") end

Debug adapter version

No response

Steps to Reproduce

start debugger

terminate()

Expected Result

ON DISCONNECT in messages

Actual Result

nothing

[Abhishek Banerji]

the listeners don't get executed if no callback is set for a given request.

[Mathias Fußenegger]

Thanks, I merged your PR #566