Update to assertj 3.11.0

Fixes: gh-5686

config/src/test/java/org/springframework/security/config/annotation/method/configuration/EnableReactiveMethodSecurityTests.java

@@ -66,7 +66,7 @@ public class EnableReactiveMethodSecurityTests {
 		assertThatThrownBy(() -> this.messageService.notPublisherPreAuthorizeFindById(1L))
 			.isInstanceOf(IllegalStateException.class)
 			.extracting(Throwable::getMessage)
-			.contains("The returnType class java.lang.String on public abstract java.lang.String org.springframework.security.config.annotation.method.configuration.ReactiveMessageService.notPublisherPreAuthorizeFindById(long) must return an instance of org.reactivestreams.Publisher (i.e. Mono / Flux) in order to support Reactor Context");
+			.isEqualTo("The returnType class java.lang.String on public abstract java.lang.String org.springframework.security.config.annotation.method.configuration.ReactiveMessageService.notPublisherPreAuthorizeFindById(long) must return an instance of org.reactivestreams.Publisher (i.e. Mono / Flux) in order to support Reactor Context");
 	}
 
 	@Test

gradle/dependency-management.gradle

@@ -143,7 +143,7 @@ dependencyManagement {
 		dependency 'org.aspectj:aspectjrt:1.9.1'
 		dependency 'org.aspectj:aspectjtools:1.9.1'
 		dependency 'org.aspectj:aspectjweaver:1.9.1'
-		dependency 'org.assertj:assertj-core:3.10.0'
+		dependency 'org.assertj:assertj-core:3.11.0'
 		dependency 'org.attoparser:attoparser:2.0.4.RELEASE'
 		dependency 'org.bouncycastle:bcpkix-jdk15on:1.60'
 		dependency 'org.bouncycastle:bcprov-jdk15on:1.58'