Wrap IOException as an UncheckedIOException

Author: oliemansm

src/main/java/graphql/servlet/internal/SubscriptionSender.java

@@ -4,6 +4,7 @@
 
 import javax.websocket.Session;
 import java.io.IOException;
+import java.io.UncheckedIOException;
 
 class SubscriptionSender {
 
@@ -17,7 +18,7 @@ void send(Session session, Object payload) {
         try {
             session.getBasicRemote().sendText(objectMapper.writeValueAsString(payload));
         } catch (IOException e) {
-            throw new RuntimeException("Error sending subscription response", e);
+            throw new UncheckedIOException("Error sending subscription response", e);
         }
     }
 }