fix(mail): migrate filesystem helpers to fsUtils, update DKIM and mail APIs, harden SMTP client, and bump dependencies

ts/sms/classes.smsservice.ts

@@ -68,15 +68,13 @@ export class SmsService {
       recipients: [{ msisdn: toNumber }],
     };
 
-    const resp = await plugins.smartrequest.request('https://gatewayapi.com/rest/mtsms', {
-      method: 'POST',
-      requestBody: JSON.stringify(payload),
-      headers: {
-        Authorization: `Basic ${Buffer.from(`${this.config.apiGatewayApiToken}:`).toString('base64')}`,
-        'Content-Type': 'application/json',
-      },
-    });
-    const json = await resp.body;
+    const resp = await plugins.smartrequest.SmartRequestClient.create()
+      .url('https://gatewayapi.com/rest/mtsms')
+      .header('Authorization', `Basic ${Buffer.from(`${this.config.apiGatewayApiToken}:`).toString('base64')}`)
+      .header('Content-Type', 'application/json')
+      .json(payload)
+      .post();
+    const json = resp.body;
     logger.log('info', `sent an sms to ${toNumber} with text '${messageText}'`, {
       eventType: 'sentSms',
       sms: {