Add Webhook response node (#2254)

* ✨ Add Webhook-Response-Node

* ⚡ Replace callback function with promise

* ✨ Add support for Bull and binary-data

* ✨ Add string response option

* ⚡ Remove some comments

* ✨ Make more generically possible & fix issue multi call in
queue mode

* ⚡ Fix startup and eslint issues

* ⚡ Improvements to webhook response node and functionality

* ⚡ Replace data with more generic type

* ⚡ Make statusMessage optional

* ⚡ Change parameter order

* ⚡ Move Response Code underneath options

* ⚡ Hide Response Code on Webhook node if mode responseNode got selected

* ⚡ Minor improvements

* ⚡ Add missing file and fix lint issue

* ⚡ Fix some node linting issues

* ⚡ Apply feedback

* ⚡ Minor improvements

packages/core/test/Helpers.ts

@@ -4,6 +4,7 @@ import {
 	ICredentialDataDecryptedObject,
 	ICredentialsHelper,
 	IDataObject,
+	IDeferredPromise,
 	IExecuteWorkflowInfo,
 	INodeCredentialsDetails,
 	INodeExecutionData,
@@ -20,7 +21,7 @@ import {
 	WorkflowHooks,
 } from 'n8n-workflow';
 
-import { Credentials, IDeferredPromise, IExecuteFunctions } from '../src';
+import { Credentials, IExecuteFunctions } from '../src';
 
 export class CredentialsHelper extends ICredentialsHelper {
 	getDecrypted(