Fix spring-boot-antlib version

See spring-projectsgh-6978

Author: snicoll

spring-boot-samples/spring-boot-sample-ant/pom.xml

@@ -83,7 +83,7 @@
 					<dependency>
 						<groupId>org.springframework.boot</groupId>
 						<artifactId>spring-boot-antlib</artifactId>
-						<version>1.4.0.BUILD-SNAPSHOT</version>
+						<version>1.4.2.BUILD-SNAPSHOT</version>
 					</dependency>
 				</dependencies>
 			</plugin>