Remove symfony 4.1 deprecation messages

Author: brexis

src/WorkflowRegistry.php

@@ -11,7 +11,7 @@
 use Symfony\Component\Workflow\MarkingStore\SingleStateMarkingStore;
 use Symfony\Component\Workflow\Registry;
 use Symfony\Component\Workflow\StateMachine;
-use Symfony\Component\Workflow\SupportStrategy\ClassInstanceSupportStrategy;
+use Symfony\Component\Workflow\SupportStrategy\InstanceOfSupportStrategy;
 use Symfony\Component\Workflow\Transition;
 use Symfony\Component\Workflow\Workflow;
 
@@ -75,7 +75,7 @@ public function get($subject, $workflowName = null)
      */
     public function add(Workflow $workflow, $supportStrategy)
     {
-        $this->registry->add($workflow, new ClassInstanceSupportStrategy($supportStrategy));
+        $this->registry->addWorkflow($workflow, new InstanceOfSupportStrategy($supportStrategy));
     }
 
     /**