Add a missing await

lib/alias.js

@@ -161,7 +161,7 @@ export default class Alias extends Now {
 
       if (!isZeitWorld(nameservers)) {
         if (this._debug) console.log(`> [debug] Trying to register a non-ZeitWorld domain ${domain} for the current user`);
-        this.setupDomain(domain, { isExternal: true });
+        await this.setupDomain(domain, { isExternal: true });
       }
 
       console.log(`> Verification ${chalk.bold('OK')}!`);