fix syntax error due to assert (#21)

* fix syntax error due to `assert`

nodejs/node#52104 (comment)

* fix missed assert

thanks for pointing it out puxlit

* bump nodejs version and regenerate package-lock.json per kocka's request

main.js

@@ -10,10 +10,10 @@
  */
 import {CookieJar} from 'tough-cookie';
 import {WebhookClient} from 'discord.js';
-import config from './config.json' assert {type: 'json'};
+import config from './config.json' with {type: 'json'};
 import got from 'got';
 import {parse} from 'node-html-parser';
-import pkg from './package.json' assert {type: 'json'};
+import pkg from './package.json' with {type: 'json'};
 import process from 'process';
 import {writeFile} from 'fs/promises';
 
@@ -62,7 +62,7 @@ class ContentReviewLog {
     async _initCache() {
         try {
             this._data = (await import('./cache.json', {
-                assert: {
+                with: {
                     type: 'json'
                 }
             })).default;