Add Override annotations where appropriate

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/event/weather/LightningStrikeEvent.java

@@ -26,10 +26,12 @@ public class LightningStrikeEvent extends WeatherEvent implements Cancellable {
         this.cause = cause;
     }
 
+    @Override
     public boolean isCancelled() {
         return canceled;
     }
 
+    @Override
     public void setCancelled(boolean cancel) {
         canceled = cancel;
     }

paper-api/src/main/java/org/bukkit/event/weather/ThunderChangeEvent.java

@@ -18,10 +18,12 @@ public class ThunderChangeEvent extends WeatherEvent implements Cancellable {
         this.to = to;
     }
 
+    @Override
     public boolean isCancelled() {
         return canceled;
     }
 
+    @Override
     public void setCancelled(boolean cancel) {
         canceled = cancel;
     }

paper-api/src/main/java/org/bukkit/event/weather/WeatherChangeEvent.java

@@ -18,10 +18,12 @@ public class WeatherChangeEvent extends WeatherEvent implements Cancellable {
         this.to = to;
     }
 
+    @Override
     public boolean isCancelled() {
         return canceled;
     }
 
+    @Override
     public void setCancelled(boolean cancel) {
         canceled = cancel;
     }