Evaluates a regex on the input and validates if matches.
Valid values:
validator.regex(/[a-z]/).validate('a');
validator.regex(/[0-9]/).validate(0);Invalid values:
validator.regex(/[a-z]/).validate(0);
validator.regex(/[0-9]/).validate('a');Throw error if the regex is invalid:
validator.regex({}).validate('foo'); // Error('Invalid RegExp.')