fix(core): update

ts/mta/mta.classes.dnsmanager.ts

@@ -0,0 +1,10 @@
+import type { MTA } from './mta.classes.mta.js';
+import * as plugins from './plugins.js';
+
+export class DNSManager {
+  public mtaRef: MTA;
+
+  constructor(mtaRefArg: MTA) {
+    this.mtaRef = mtaRefArg;
+  }
+}