chore(platform): PHPMNT-177 Add PHP 8.4 to CircleCI matrix

Author: TomA-R

.circleci/config.yml

@@ -9,7 +9,7 @@ jobs_default: &jobs_default
     php-version: << matrix.php-version >>
   matrix:
     parameters:
-      php-version: [ "8.2", "8.3" ]
+      php-version: [ "8.2", "8.3", "8.4" ]
 
 
 workflows:

src/MockInjector.php

@@ -33,8 +33,8 @@ class MockInjector implements InjectorInterface
      * @param InjectorInterface $injector
      */
     public function __construct(
-        MockingContainerInterface $mockingContainer = null,
-        InjectorInterface $injector = null
+        ?MockingContainerInterface $mockingContainer = null,
+        ?InjectorInterface $injector = null
     ) {
         $this->mockingContainer = $mockingContainer ?? new ProphecyMockingContainer(new Prophet());
         if (!$injector) {