Merge branch '4.0.x'

Closes gh-1501

gradle.properties

@@ -3,4 +3,5 @@ version=4.1.0-SNAPSHOT
 org.gradle.caching=true
 org.gradle.parallel=true
 
+compatibilityTestPluginVersion=0.0.3
 springFrameworkVersion=6.2.4

spring-ws-security/build.gradle

@@ -1,6 +1,7 @@
 plugins {
 	id "java-library"
 	id "maven-publish"
+	id "io.spring.compatibility-test" version "${compatibilityTestPluginVersion}"
 	id "org.springframework.ws.conventions"
 	id "org.springframework.ws.optional-dependencies"
 }
@@ -36,3 +37,11 @@ dependencies {
 	testImplementation("org.junit.jupiter:junit-jupiter")
 	testImplementation("org.springframework:spring-test")
 }
+
+compatibilityTest {
+	dependency("WSS4J") { wss4j ->
+		wss4j.groupId = "org.apache.wss4"
+		wss4j.versions = ["2.0.+", "3.0.+"]
+	}
+}
+