Fix issue with types being a dependency in hookable (#816)

* Fix issue with types being a dependency in hookable

* Interface not class

* Interface not class

Author: srtfisher

CHANGELOG.md

@@ -28,19 +28,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Clear `$_COOKIE` and `$_SESSION` in addition to other superglobals when
   cleaning the global scope between tests.
-
-
-### Changed
-
-- Clear `$_COOKIE` and `$_SESSION` in addition to other superglobals when
-  cleaning the global scope between tests.
-
-
-### Changed
-
 - Added `Deprecation` attribute to some already-deprecated methods in the
   framework to better indicate their deprecation status.
 
+### Fixed
+
+- Fixed issue where `Mantle\Types\Validator` is used within `mantle-framework/support` but `mantle-framework/types` is not a dependency.
+
 ## v1.12.4
 
 ### Fixed

src/mantle/support/traits/trait-hookable.php

@@ -275,6 +275,10 @@ protected function fire_doing_it_wrong( ReflectionMethod $method ): void {
 	 * @param ReflectionMethod $method The hook callback method.
 	 */
 	protected function validate_method( ReflectionMethod $method ): bool {
+		if ( ! interface_exists( \Mantle\Types\Validator::class ) ) {
+			return true;
+		}
+
 		$attributes = $method->getAttributes( \Mantle\Types\Validator::class, \ReflectionAttribute::IS_INSTANCEOF );
 
 		// Check all validators for this method.