Updates the language level.

Author: brianburton

pom.xml

@@ -77,6 +77,8 @@
     </scm>
 
     <properties>
+        <maven.compiler.target>11</maven.compiler.target>
+        <maven.compiler.source>11</maven.compiler.source>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>