fix(deps): update dependency mysql2 to v2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
mysql2	dependencies	major	1.7.0 -> 2.0.2

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Release Notes

sidorares/node-mysql2

### [`v2.0.2`](https://togithub.com/sidorares/node-mysql2/compare/v2.0.1...v2.0.2) [Compare Source](https://togithub.com/sidorares/node-mysql2/compare/v2.0.1...v2.0.2) ### [`v2.0.1`](https://togithub.com/sidorares/node-mysql2/compare/v2.0.0...v2.0.1) [Compare Source](https://togithub.com/sidorares/node-mysql2/compare/v2.0.0...v2.0.1) ### [`v2.0.0`](https://togithub.com/sidorares/node-mysql2/compare/cef866ee85c6b4d38e277e39038b0fce51c343d0...v2.0.0) [Compare Source](https://togithub.com/sidorares/node-mysql2/compare/cef866ee85c6b4d38e277e39038b0fce51c343d0...v2.0.0)

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[coveralls]

Coverage remained the same at 80.638% when pulling 2f6ac0dc635b98264cdfe88775500fca4ffdbbc1 on renovate/mysql2-2.x into eb24105278ddfe26b1c1348bb4d8d05a4649ba23 on master.