[Snyk] Security upgrade sequelize from 6.16.1 to 6.21.2

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json
  • package-lock.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	636/1000 Why? Recently disclosed, Has a fix available, CVSS 7	SQL Injection SNYK-JS-SEQUELIZE-2959225	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: sequelize

The new version differs by 32 commits.

• 7bb60e3 fix: properly escaoe multiple `$` in `fn` args (#14678)
• 86d35b1 docs: added nest option inside findAll query (#14683)
• 2f3b924 fix(postgres): use schema set in sequelize config by default (#14665)
• cbdf73e feat: exports types to support typescript >= 4.5 nodenext module (#14620)
• a333862 docs(readme): update README to be more like main (#14626)
• e1a9c28 fix: kill connection on commit/rollback error (#14535)
• b37df96 feat: support cyclic foreign keys (#14499)
• e37c572 fix: accept replacements in `ARRAY[]` & followed by `;` (#14518)
• 6c5f8ec test: disable mysql/mariadb deadlock test (#14514)
• 87655eb build: fix esdoc (#14513)
• ccaa399 fix: do not replace `:replacements` inside of strings (#14472)
• 5954d2c feat(types): make `Model.init` aware of pre-configured foreign keys (#14370)
• 0d0aade fix(types): make `WhereOptions` more accurate (#14368)
• 7e8b707 docs: restore Model api reference & make fail on error (#14323)
• ca0e017 test: disable deadlock test for mariadb 10.5.15 (#14314)
• 62564f7 docs: fix dead link in API reference (#14313)
• cdc8881 build: remove v6 docs from repository (#14234)
• 730af27 docs: document scope whereMergeStrategy option (#14201)
• 8349c02 feat: add whereScopeStrategy to merge where scopes with Op.and (#14152)
• e974e20 feat(types): make `Model.getAttributes` stricter (#14017)
• 2d339d0 fix: fix typo in query-generator.js error message (#14151)
• b80aeed fix(types): update return type of `Model.update` (#14155)
• f5c06bd feat(types): infer nullable creation attributes as optional (#14147)
• af6cbe6 build(deps): move @ types/validator to prod deps (#14159)

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