chore(deps-dev): bump mysql2 from 3.10.2 to 3.10.3 (#309)

Bumps [mysql2](https://github.com/sidorares/node-mysql2) from 3.10.2 to 3.10.3.
- [Release notes](https://github.com/sidorares/node-mysql2/releases)
- [Changelog](https://github.com/sidorares/node-mysql2/blob/master/Changelog.md)
- [Commits](sidorares/node-mysql2@v3.10.2...v3.10.3)

---
updated-dependencies:
- dependency-name: mysql2
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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