Add release property for java 11. (#11)

Signed-off-by: Nikolay Chakarov <[email protected]>

Author: nchakarovvmw

pom.xml

@@ -124,10 +124,11 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.6.0</version>
+				<version>3.8.0</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>
+					<release>11</release>
 				</configuration>
 			</plugin>