fix: use @nestjs/class-validator

[elliotttf]

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe: this updates the version of class-validator in use to be @nestjs/class-validator which addresses the Improper Input Validation vulnerability identified by SNYK-JS-CLASSVALIDATOR-1730566

What is the current behavior?

Issue Number: typestack/class-validator#1443

What is the new behavior?

Behavior is unchanged, only the imports have been updated.

Does this PR introduce a breaking change?

• Yes
• No
• Maybe... class-validator was an optional peer dependency, so code will not outright break, but it could be misleading for dependent modules. In order to preserve 1:1 behavior, dependents would need to remove class-validator and add @nestjs/class-validator in its place.

[kamilmysliwiec]

Thanks for your suggestion!

This has been discussed in the past and we decided to not migrate it in the foreseeable future.

If you think your request could live outside Nest's scope, we'd encourage you to collaborate with the community on publishing it as an open source package.