Added manifest version 1.6

Author: aurelclockify

addon-sdk/src/main/java/com/cake/clockify/addonsdk/clockify/ClockifyAddon.java

@@ -7,6 +7,7 @@
 import lombok.NonNull;
 
 public class ClockifyAddon extends Addon<ClockifyManifest> {
+
     public ClockifyAddon(@NonNull ClockifyManifest manifest) {
         super(manifest);
     }