Fixes breaking change from upgrade to validator@5 (related to "non-string coercion" -- see https://github.com/chriso/validator.js/blob/e8eef94282523072ecf5b7d7934025ca047a323f/CHANGELOG.md#500 and validatorjs/validator.js#496)
Fixes breaking change from upgrade to validator@5 (related to "non-string coercion" -- see https://github.com/chriso/validator.js/blob/e8eef94282523072ecf5b7d7934025ca047a323f/CHANGELOG.md#500 and validatorjs/validator.js#496)