Bump validator and @types/validator

Bumps [validator](https://github.com/validatorjs/validator.js) and [@types/validator](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/validator). These dependencies needed to be updated together.

Updates `validator` from 13.15.0 to 13.15.15
- [Release notes](https://github.com/validatorjs/validator.js/releases)
- [Changelog](https://github.com/validatorjs/validator.js/blob/master/CHANGELOG.md)
- [Commits](validatorjs/validator.js@13.15.0...13.15.15)

Updates `@types/validator` from 13.15.0 to 13.15.2
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/validator)

---
updated-dependencies:
- dependency-name: validator
  dependency-version: 13.15.15
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: "@types/validator"
  dependency-version: 13.15.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]