[Snyk] Security upgrade mysql2 from 2.3.3 to 3.9.8

[spinsager]

This PR was automatically created by Snyk using the credentials of a real user.


Snyk has created this PR to fix 1 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• package.json

⚠️ Warning

``` Failed to update the package-lock.json, please update manually before merging. ```

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Prototype Pollution SNYK-JS-MYSQL2-6861580	803

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🦉 Prototype Pollution