Update to Spring Framework 5.0.0.RELEASE

Fixes gh-4585

core/src/main/java/org/springframework/security/core/SpringSecurityCoreVersion.java

@@ -40,7 +40,7 @@ public class SpringSecurityCoreVersion {
 	 */
 	public static final long SERIAL_VERSION_UID = 500L;
 
-	static final String MIN_SPRING_VERSION = "5.0.0.BUILD-SNAPSHOT";
+	static final String MIN_SPRING_VERSION = "5.0.0.RELEASE";
 
 	static {
 		performVersionChecks();

gradle/dependency-management.gradle

@@ -1,7 +1,7 @@
 dependencyManagement {
 	imports {
 		mavenBom 'io.projectreactor:reactor-bom:Bismuth-RELEASE'
-		mavenBom 'org.springframework:spring-framework-bom:5.0.0.BUILD-SNAPSHOT'
+		mavenBom 'org.springframework:spring-framework-bom:5.0.0.RELEASE'
 		mavenBom 'org.springframework.data:spring-data-releasetrain:Kay-BUILD-SNAPSHOT'
 	}
 	dependencies {