Bump sequelize from 6.15.1 to 6.16.0

Bumps [sequelize](https://github.com/sequelize/sequelize) from 6.15.1 to 6.16.0.
- [Release notes](https://github.com/sequelize/sequelize/releases)
- [Commits](sequelize/sequelize@v6.15.1...v6.16.0)

---
updated-dependencies:
- dependency-name: sequelize
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]