chore: add changeset for transport type fix

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: juandav

.changeset/transport-type-fix.md

@@ -0,0 +1,5 @@
+---
+'@nestjs-modules/mailer': patch
+---
+
+Allow all transport types for additional transports and addTransporter method.

packages/mailer/dist/interfaces/mailer-options.interface.d.ts

@@ -12,7 +12,7 @@ export interface MailerOptions {
     defaults?: Options;
     transport?: TransportType;
     transports?: {
-        [name: string]: SMTPTransport | SMTPTransport.Options | string;
+        [name: string]: TransportType;
     };
     template?: {
         dir?: string;

packages/mailer/dist/mailer.service.d.ts

@@ -1,6 +1,5 @@
 import { SentMessageInfo } from 'nodemailer';
-import * as smtpTransport from 'nodemailer/lib/smtp-transport';
-import { MailerOptions } from './interfaces/mailer-options.interface';
+import { MailerOptions, TransportType } from './interfaces/mailer-options.interface';
 import { MailerTransportFactory as IMailerTransportFactory } from './interfaces/mailer-transport-factory.interface';
 import { ISendMailOptions } from './interfaces/send-mail-options.interface';
 export declare class MailerService {
@@ -18,5 +17,5 @@ export declare class MailerService {
     private verifyTransporter;
     verifyAllTransporters(): Promise<boolean>;
     sendMail(sendMailOptions: ISendMailOptions): Promise<SentMessageInfo>;
-    addTransporter(transporterName: string, config: string | smtpTransport | smtpTransport.Options): string;
+    addTransporter(transporterName: string, config: TransportType): string;
 }