⚡ Simplify more property types in credentials classes (#2211)

* ⚡ Simplify more property types

* 👕 Fix lint

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

@@ -1,23 +1,23 @@
 import {
 	ICredentialType,
-	NodePropertyTypes,
+	INodeProperties,
 } from 'n8n-workflow';
 
 export class MarketstackApi implements ICredentialType {
 	name = 'marketstackApi';
 	displayName = 'Marketstack API';
 	documentationUrl = 'marketstack';
-	properties = [
+	properties: INodeProperties[] = [
 		{
 			displayName: 'API Key',
 			name: 'apiKey',
-			type: 'string' as NodePropertyTypes,
+			type: 'string',
 			default: '',
 		},
 		{
 			displayName: 'Use HTTPS',
 			name: 'useHttps',
-			type: 'boolean' as NodePropertyTypes,
+			type: 'boolean',
 			default: false,
 			description: 'Use HTTPS (paid plans only).',
 		},