Fix object validator (#2897)

Make sure we check if we have the optional function before calling it

### Change Type

- [x] `patch` — Bug fix
- [ ] `minor` — New feature
- [ ] `major` — Breaking change
- [ ] `dependencies` — Changes to package dependencies[^1]
- [ ] `documentation` — Changes to the documentation only[^2]
- [ ] `tests` — Changes to any test code only[^2]
- [ ] `internal` — Any other changes that don't affect the published
package[^2]
- [ ] I don't know

[^1]: publishes a `patch` release, for devDependencies use `internal`
[^2]: will not publish a new version

packages/validate/src/lib/validation.ts

@@ -290,7 +290,7 @@ export class ObjectValidator<Shape extends object> extends Validator<Shape> {
 
 				for (const [key, validator] of Object.entries(config)) {
 					prefixError(key, () => {
-						;(validator as Validator<unknown>).validate(getOwnProperty(object, key))
+						;(validator as Validatable<unknown>).validate(getOwnProperty(object, key))
 					})
 				}
 
@@ -319,7 +319,12 @@ export class ObjectValidator<Shape extends object> extends Validator<Shape> {
 						continue
 					}
 					const checked = prefixError(key, () => {
-						return (validator as Validator<unknown>).validateUsingKnownGoodVersion(prev, next)
+						const validatable = validator as Validatable<unknown>
+						if (validatable.validateUsingKnownGoodVersion) {
+							return validatable.validateUsingKnownGoodVersion(prev, next)
+						} else {
+							return validatable.validate(next)
+						}
 					})
 					if (!Object.is(checked, prev)) {
 						isDifferent = true