Add missed builder method to WorldType

Author: aromaa

src/main/java/org/spongepowered/api/world/WorldType.java

@@ -24,6 +24,7 @@
  */
 package org.spongepowered.api.world;
 
+import org.spongepowered.api.Sponge;
 import org.spongepowered.api.data.Key;
 import org.spongepowered.api.data.value.Value;
 import org.spongepowered.api.datapack.DataPackSerializable;
@@ -36,6 +37,10 @@
 @CatalogedBy(WorldTypes.class)
 public interface WorldType extends DefaultedRegistryValue, ContextSource, WorldTypeDataFetcher, DataPackSerializable {
 
+    static WorldType.Builder builder() {
+        return Sponge.game().builderProvider().provide(WorldType.Builder.class);
+    }
+
     interface Builder extends org.spongepowered.api.util.Builder<WorldType, Builder>, CopyableBuilder<WorldType, Builder> {
 
         <V> Builder add(Key<? extends Value<V>> key, V value);