fix(deps): update dependency mysql2 to v2.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
mysql2	dependencies	minor	2.0.2 -> 2.1.0

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Release Notes

sidorares/node-mysql2

### [`v2.1.0`](https://togithub.com/sidorares/node-mysql2/compare/v2.0.2...v2.1.0) [Compare Source](https://togithub.com/sidorares/node-mysql2/compare/v2.0.2...v2.1.0)

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Branch automerge failure

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[coveralls]

Coverage remained the same at 80.638% when pulling 71808a6cd38da7010117006679e8c64eb1e59de3 on renovate/mysql2-2.x into 9941fbf0e0c5502638131c6f1f4929a9561689ec on master.