build(deps): bump discord.js from 12.3.1 to 12.5.3

Bumps [discord.js](https://github.com/discordjs/discord.js) from 12.3.1 to 12.5.3.
- [Release notes](https://github.com/discordjs/discord.js/releases)
- [Commits](discordjs/discord.js@12.3.1...12.5.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -14,7 +14,7 @@
     "heroku-postbuild": "tsc -p ."
   },
   "dependencies": {
-    "discord.js": "^12.3.1"
+    "discord.js": "^12.5.3"
   },
   "devDependencies": {
     "@types/node": "^15.12.2",