Fixed ParticleConverter#convertToBukkit return type for retro compatibility

Author: fulminazzo

wrappers/bukkit/src/main/java/it/fulminazzo/yagl/ParticleConverter.java

@@ -59,7 +59,7 @@ enum ParticleConverter {
      * @param particle the particle
      * @return the converted particle
      */
-    public static org.bukkit.Particle convertToBukkit(final @NotNull Particle particle) {
+    public static Object convertToBukkit(final @NotNull Particle particle) {
         try {
             return EnumUtils.valueOf(org.bukkit.Particle.class, particle.getType());
         } catch (IllegalArgumentException e) {