⚡ Simplify property types in credentials (#1869)

packages/nodes-base/credentials/FacebookGraphAppApi.credentials.ts

@@ -1,6 +1,6 @@
 import {
 	ICredentialType,
-	NodePropertyTypes,
+	INodeProperties,
 } from 'n8n-workflow';
 
 export class FacebookGraphAppApi implements ICredentialType {
@@ -10,11 +10,11 @@ export class FacebookGraphAppApi implements ICredentialType {
 	extends = [
 		'facebookGraphApi',
 	];
-	properties = [
+	properties: INodeProperties[] = [
 		{
 			displayName: 'App Secret',
 			name: 'appSecret',
-			type: 'string' as NodePropertyTypes,
+			type: 'string',
 			default: '',
 			description: '(Optional) When the app secret is set the node will verify this signature to validate the integrity and origin of the payload.',
 		},