Bump sequelize from 3.35.1 to 6.29.0

Bumps [sequelize](https://github.com/sequelize/sequelize) from 3.35.1 to 6.29.0.
- [Release notes](https://github.com/sequelize/sequelize/releases)
- [Commits](sequelize/sequelize@v3.35.1...v6.29.0)

---
updated-dependencies:
- dependency-name: sequelize
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>