Fixes nodemailer#355 Deprecation warning of the punycode module

Author: Kequc

lib/mail-parser.js

@@ -5,7 +5,7 @@ const libmime = require('libmime');
 const addressparser = require('nodemailer/lib/addressparser');
 const Transform = require('stream').Transform;
 const Splitter = mailsplit.Splitter;
-const punycode = require('punycode');
+const punycode = require('punycode/');
 const FlowedDecoder = require('mailsplit/lib/flowed-decoder');
 const StreamHash = require('./stream-hash');
 const iconv = require('iconv-lite');

package-lock.json

@@ -25,6 +25,7 @@
         "linkify-it": "5.0.0",
         "mailsplit": "5.4.0",
         "nodemailer": "6.9.8",
+        "punycode": "^2.3.1",
         "tlds": "1.248.0"
     },
     "devDependencies": {