Update spring release versions

- Graphql modification because of api change

Author: cppwfs

build.gradle

@@ -102,11 +102,11 @@ ext {
     smackVersion = '4.4.8'
     springAmqpVersion = '4.0.4'
     springDataVersion = '2025.1.6'
-    springGraphqlVersion = '2.0.3'
+    springGraphqlVersion = '2.0.4'
     springKafkaVersion = '4.0.6'
     springSecurityVersion = '7.0.6'
-    springVersion = '7.0.8-SNAPSHOT'
-    springWsVersion = '5.0.1'
+    springVersion = '7.0.8'
+    springWsVersion = '5.0.2'
     testcontainersVersion = '2.0.5'
     tomcatVersion = '11.0.22'
     xmlUnitVersion = '2.11.0'

spring-integration-graphql/src/main/java/org/springframework/integration/graphql/outbound/GraphQlMessageHandler.java

@@ -145,7 +145,7 @@ protected Object handleRequestMessage(Message<?> requestMessage) {
 		else {
 			String query = evaluateOperationExpression(requestMessage);
 			String operationName = evaluateOperationNameExpression(requestMessage);
-			Map<String, Object> variables = evaluateVariablesExpression(requestMessage);
+			Map<String, @Nullable Object> variables = evaluateVariablesExpression(requestMessage);
 			String id = evaluateExecutionIdExpression(requestMessage);
 			Assert.notNull(id, "The 'executionIdExpression' must not evaluate to null");
 			graphQlRequest = new DefaultExecutionGraphQlRequest(query, operationName, variables, null, id, this.locale);
@@ -171,7 +171,7 @@ private String evaluateOperationExpression(Message<?> message) {
 	}
 
 	@SuppressWarnings("unchecked")
-	private @Nullable Map<String, Object> evaluateVariablesExpression(Message<?> message) {
+	private @Nullable Map<String, @Nullable Object> evaluateVariablesExpression(Message<?> message) {
 		if (this.variablesExpression != null) {
 			return this.variablesExpression.getValue(this.evaluationContext, message, Map.class);
 		}