Fix Psalm & PHPStan errors

Author: loic425

phpstan.neon

@@ -31,6 +31,7 @@ parameters:
         - %currentWorkingDirectory%/src/Component/legacy/src/Model/*
         - %currentWorkingDirectory%/src/Component/legacy/src/Reflection/ClassReflection.php
         - %currentWorkingDirectory%/src/Component/legacy/src/Repository/*
+        - %currentWorkingDirectory%/src/Component/legacy/src/StateMachine/*
         - %currentWorkingDirectory%/src/Component/legacy/src/Storage/*
         - %currentWorkingDirectory%/src/Component/legacy/tests/*
         - %currentWorkingDirectory%/src/Component/spec/*

psalm.xml

@@ -19,6 +19,8 @@
             <file name="src/Component/legacy/src/Model/TimestampableTrait.php" />
             <file name="src/Component/legacy/src/Model/ToggleableTrait.php" />
             <file name="src/Component/legacy/src/Model/TranslatableTrait.php" />
+            <file name="src/Component/legacy/src/StateMachine/StateMachine.php" />
+            <file name="src/Component/legacy/src/StateMachine/StateMachineInterface.php" />
             <file name="src/Bundle/Controller/ControllerTrait.php" />
             <file name="src/Bundle/DependencyInjection/Driver/Doctrine/DoctrineODMDriver.php" />
             <file name="src/Bundle/DependencyInjection/Driver/Doctrine/DoctrinePHPCRDriver.php" />