fix: Fully qualify UnexpectedValueException namespace

Author: exaby73

src/EventHandler.php

@@ -186,7 +186,7 @@ private function createPreAndPostEventsAndIds(
                 ),
                 PreTransactionCommitEvent::EVENT_ID,
             ],
-            TransactionState::TERMINATED => throw new UnexpectedValueException('TERMINATED is not a valid transaction state at this point'),
+            TransactionState::TERMINATED => throw new \UnexpectedValueException('TERMINATED is not a valid transaction state at this point'),
         };
         [$postEvent, $postEventId] = match ($nextTransactionState) {
             TransactionState::ACTIVE => [
@@ -216,7 +216,7 @@ private function createPreAndPostEventsAndIds(
                 ),
                 PostTransactionCommitEvent::EVENT_ID,
             ],
-            TransactionState::TERMINATED => throw new UnexpectedValueException('TERMINATED is not a valid transaction state at this point'),
+            TransactionState::TERMINATED => throw new \UnexpectedValueException('TERMINATED is not a valid transaction state at this point'),
         };
 
         return [