changed build source and target to java 11

jplag.parent/pom.xml

@@ -43,8 +43,8 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<project.build.source>1.7</project.build.source>
-		<project.build.target>1.7</project.build.target>
+		<project.build.source>11</project.build.source>
+		<project.build.target>11</project.build.target>
 		<project.build.optimize>true</project.build.optimize>
 	</properties>