Add methods to control thunder.

By: sk89q <the.sk89q@gmail.com>

paper-api/src/main/java/org/bukkit/World.java

@@ -439,6 +439,34 @@ public interface World {
      */
     public void setWeatherDuration(int duration);
     
+    /**
+     * Returns whether there is thunder.
+     * 
+     * @return Whether there is thunder
+     */
+    public boolean isThundering();
+    
+    /**
+     * Set whether it is thundering.
+     * 
+     * @param thundering Whether it is thundering
+     */
+    public void setThundering(boolean thundering);
+    
+    /**
+     * Get the thundering duration.
+     * 
+     * @return Duration in ticks
+     */
+    public int getThunderDuration();
+    
+    /**
+     * Set the thundering duration.
+     * 
+     * @param duration Duration in ticks 
+     */
+    public void setThunderDuration(int duration);
+
     /**
      * Gets the {@link Environment} type of this world
      *