Support CI with spring 5.2 and spring-batch 4.2

Fixes gh-543

Author: kazuki43zoo

.travis.yml

@@ -8,6 +8,7 @@ jdk:
 
 script:
   - ./mvnw clean verify
+  - ./mvnw clean verify -Dspring.version=$(./travis/get_latest_version.sh spring-core 5.2) -Dspring-batch.version=$(./travis/get_latest_version.sh batch/spring-batch-core 4.2)
   - ./mvnw clean verify -Dspring.version=$(./travis/get_latest_version.sh spring-core 5.1) -Dspring-batch.version=$(./travis/get_latest_version.sh batch/spring-batch-core 4.1)
 
 after_success: