DATAJDBC-180 - Upgrade Testcontainers from 1.5.1 to 1.6.0.

Original pull request: #46.

Author: ttddyy

pom.xml

@@ -32,7 +32,7 @@
 		<mybatis-spring.version>1.3.1</mybatis-spring.version>
 		<mysql-connector-java.version>5.1.41</mysql-connector-java.version>
 		<postgresql.version>42.0.0</postgresql.version>
-		<testcontainers.version>1.5.1</testcontainers.version>
+		<testcontainers.version>1.6.0</testcontainers.version>
 
 	</properties>