fix: forward dispatch return value

lib/dispatcher/dispatcher.js

@@ -39,18 +39,35 @@ class Dispatcher extends EventEmitter {
  }
 }
 
+const kOnDrain = Symbol('onDrain')
+const kOnConnect = Symbol('onConnect')
+const kOnDisconnect = Symbol('onDisconnect')
+const kOnConnectionError = Symbol('onConnectionError')
+
 class ComposedDispatcher extends Dispatcher {
- #dispatcher = null
- #dispatch = null
+ #dispatcher
+ #dispatch
 
  constructor (dispatcher, dispatch) {
  super()
+
  this.#dispatcher = dispatcher
  this.#dispatch = dispatch
+
+ this[kOnDrain] = (...args) => this.emit('drain', ...args)
+ this[kOnConnect] = (...args) => this.emit('connect', ...args)
+ this[kOnDisconnect] = (...args) => this.emit('disconnect', ...args)
+ this[kOnConnectionError] = (...args) => this.emit('connectionError', ...args)
+
+ this.#dispatcher
+ .on('drain', this[kOnDrain])
+ .on('connect', this[kOnConnect])
+ .on('disconnect', this[kOnDisconnect])
+ .on('connectionError', this[kOnConnectionError])
  }
 
  dispatch (...args) {
- this.#dispatch(...args)
+ return this.#dispatch(...args)
  }
 
  close (...args) {