[Snyk] Upgrade discord.js from 12.3.1 to 12.5.3

[jjoltt]

Snyk has created this PR to upgrade discord.js from 12.3.1 to 12.5.3.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 6 versions ahead of your current version.

• The recommended version was released 4 years ago.

Release notes

Package name: discord.js

• 12.5.3 - 2021-04-02
• 12.5.2 - 2021-03-31
• 12.5.1 - 2020-11-25
• 12.5.0 - 2020-11-22
• 12.4.1 - 2020-10-24
• 12.4.0 - 2020-10-19
• 12.3.1 - 2020-08-15

from discord.js GitHub release notes

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Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• This PR was automatically created by Snyk using the credentials of a real user.

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