fix(core): update

ts/index.ts

@@ -31,13 +31,23 @@ export class Smartsmtp {
     toArg: string,
     dataArg = {}
   ) {
-    const message = {
+    const message: plugins.nodemailer.SendMailOptions = {
       from: smartmailArg.options.from,
       to: toArg,
       subject: smartmailArg.getSubject(dataArg),
       text: smartmailArg.getBody(dataArg),
       html: smartmailArg.getBody(dataArg),
+      attachments: []
     };
+
+    // lets add attachments from smartmailArg
+    for (const attachment of smartmailArg.attachments) {
+      message.attachments.push({
+        filename: attachment.parsedPath.base,
+        content: attachment.contentBuffer
+      });
+    }
+
     const response = await this.nodemailerTransport.sendMail(message);
     return response;
   }