Start building against Spring WS 4.0.0 snapshots

See gh-33139

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -1433,14 +1433,10 @@ bom {
 			]
 		}
 	}
-	library("Spring WS", "4.0.0-RC1") {
+	library("Spring WS", "4.0.0-SNAPSHOT") {
 		group("org.springframework.ws") {
-			modules = [
+			imports = [
-				"spring-ws-core",
+					"spring-ws-bom"
-				"spring-ws-security",
-				"spring-ws-support",
-				"spring-ws-test",
-				"spring-xml"
 			]
 		}
 	}