Update Lombok

...to make it work with jdk9

pom.xml

@@ -62,7 +62,7 @@
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
-            <version>1.16.6</version>
+            <version>1.16.20</version>
             <scope>provided</scope>
         </dependency>