push to java16

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>tsp.headdb</groupId>
     <artifactId>HeadDB</artifactId>
-    <version>4.2.0</version>
+    <version>4.2.1</version>
     <packaging>jar</packaging>
 
     <name>HeadDB</name>
@@ -87,8 +87,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
-                    <source>9</source>
-                    <target>9</target>
+                    <source>16</source>
+                    <target>16</target>
                 </configuration>
             </plugin>