[Snyk] Upgrade mysql2 from 3.9.8 to 3.15.0

[pleichtyTZ]

Snyk has created this PR to upgrade mysql2 from 3.9.8 to 3.15.0.

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 42 versions ahead of your current version.

• The recommended version was released a month ago.

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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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[deepsource-io]

Here's the code health analysis summary for commits 0264fe3..d328bd3. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
JavaScript	✅ Success		View Check ↗

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch snyk-upgrade-5fdcb72576a28b8bdfaa8d203de24bb8

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