Update due to deprecation warnings

spring-web/src/main/java/org/springframework/http/converter/AbstractHttpMessageConverter.java

@@ -224,7 +224,7 @@ public abstract class AbstractHttpMessageConverter<T> implements HttpMessageConv
 				}
 				@Override
 				public boolean repeatable() {
-					return supportsRepeatableWrites(t);
+					return canWriteRepeatedly(t, null);
 				}
 			});
 		}

spring-web/src/test/java/org/springframework/web/client/HttpMessageConverterExtractorTests.java

@@ -52,7 +52,7 @@ import static org.mockito.Mockito.mock;
  * @author Brian Clozel
  * @author Sam Brannen
  */
-@SuppressWarnings("removal")
+@SuppressWarnings({ "deprecation", "removal"})
 class HttpMessageConverterExtractorTests {
 
 	private final HttpMessageConverter<String> converter = mock();

spring-websocket/src/test/java/org/springframework/web/socket/sockjs/client/RestTemplateXhrTransportTests.java

@@ -202,7 +202,7 @@ class RestTemplateXhrTransportTests {
 	}
 
 
-	@SuppressWarnings("removal")
+	@SuppressWarnings({"deprecation", "removal"})
 	private static class TestRestTemplate extends RestTemplate {
 
 		private Queue<ClientHttpResponse> responses = new LinkedBlockingDeque<>();