Test against Java 20 on CI.

See #1462.

Jenkinsfile

@@ -1,7 +1,7 @@
 def p = [:]
 node {
-    checkout scm
-    p = readProperties interpolate: true, file: 'ci/pipeline.properties'
+	checkout scm
+	p = readProperties interpolate: true, file: 'ci/pipeline.properties'
 }
 
 pipeline {
@@ -18,7 +18,7 @@ pipeline {
 	}
 
 	stages {
-		stage("test: baseline (Java 17)") {
+		stage("test: baseline (main)") {
 			when {
 				beforeAgent(true)
 				anyOf {
@@ -39,7 +39,6 @@ pipeline {
 			steps {
 				script {
 					docker.image(p['docker.java.main.image']).inside(p['docker.java.inside.docker']) {
-						sh "docker login --username ${DOCKER_HUB_USR} --password ${DOCKER_HUB_PSW}"
 						sh "PROFILE=ci,all-dbs ci/test.sh"
 						sh "ci/clean.sh"
 					}
@@ -47,6 +46,35 @@ pipeline {
 			}
 		}
 
+		stage("Test other configurations") {
+			when {
+				beforeAgent(true)
+				allOf {
+					branch(pattern: "main|(\\d\\.\\d\\.x)", comparator: "REGEXP")
+					not { triggeredBy 'UpstreamCause' }
+				}
+			}
+			parallel {
+				stage("test: baseline (next)") {
+					agent {
+						label 'data'
+					}
+					options { timeout(time: 30, unit: 'MINUTES') }
+					environment {
+						ARTIFACTORY = credentials("${p['artifactory.credentials']}")
+					}
+					steps {
+						script {
+							docker.image(p['docker.java.next.image']).inside(p['docker.java.inside.docker']) {
+								sh "PROFILE=ci,all-dbs ci/test.sh"
+								sh "ci/clean.sh"
+							}
+						}
+					}
+				}
+			}
+		}
+
 		stage('Release to artifactory') {
 			when {
 				beforeAgent(true)

spring-data-jdbc/pom.xml

@@ -163,6 +163,12 @@
 			<artifactId>assertj-core</artifactId>
 			<version>${assertj}</version>
 			<scope>test</scope>
+			<exclusions>
+				<exclusion>
+					<groupId>net.bytebuddy</groupId>
+					<artifactId>byte-buddy</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>

spring-data-r2dbc/pom.xml

@@ -167,6 +167,12 @@
 			<artifactId>assertj-core</artifactId>
 			<version>${assertj}</version>
 			<scope>test</scope>
+			<exclusions>
+				<exclusion>
+					<groupId>net.bytebuddy</groupId>
+					<artifactId>byte-buddy</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>

spring-data-relational/pom.xml

@@ -62,6 +62,12 @@
 			<artifactId>assertj-core</artifactId>
 			<version>${assertj}</version>
 			<scope>test</scope>
+			<exclusions>
+				<exclusion>
+					<groupId>net.bytebuddy</groupId>
+					<artifactId>byte-buddy</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 		<dependency>