refactor: Add IRequestOptions type to helpers.request for more type safety (no-changelog) (#8563)

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/nodes-base/nodes/Mailgun/Mailgun.node.ts

@@ -5,6 +5,7 @@ import type {
 	INodeType,
 	INodeTypeDescription,
 	JsonObject,
+	IRequestOptions,
 } from 'n8n-workflow';
 import { NodeApiError } from 'n8n-workflow';
 
@@ -172,7 +173,7 @@ export class Mailgun implements INodeType {
 					formData,
 					uri: `https://${credentials.apiDomain}/v3/${credentials.emailDomain}/messages`,
 					json: true,
-				};
+				} satisfies IRequestOptions;
 
 				let responseData;