Upgrade to Spring Batch 4.2.0.M1

Closes gh-16529

Author: bclozel

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -180,7 +180,7 @@
 		<!-- deprecated in favor of "spring-framework.version" -->
 		<spring.version>5.2.0.M1</spring.version>
 		<spring-amqp.version>2.2.0.M1</spring-amqp.version>
-		<spring-batch.version>4.2.0.BUILD-SNAPSHOT</spring-batch.version>
+		<spring-batch.version>4.2.0.M1</spring-batch.version>
 		<spring-cloud-connectors.version>2.0.5.RELEASE</spring-cloud-connectors.version>
 		<spring-data-releasetrain.version>Moore-M3</spring-data-releasetrain.version>
 		<spring-framework.version>${spring.version}</spring-framework.version>