Add missing registry methods in catalog classes (#2525)

Author: ImMorpheus

src/main/java/org/spongepowered/api/data/type/SculkSensorStates.java

@@ -27,6 +27,7 @@
 import org.spongepowered.api.ResourceKey;
 import org.spongepowered.api.Sponge;
 import org.spongepowered.api.registry.DefaultedRegistryReference;
+import org.spongepowered.api.registry.Registry;
 import org.spongepowered.api.registry.RegistryKey;
 import org.spongepowered.api.registry.RegistryScope;
 import org.spongepowered.api.registry.RegistryScopes;
@@ -51,6 +52,10 @@ public final class SculkSensorStates {
     private SculkSensorStates() {
     }
 
+    public static Registry<SculkSensorState> registry() {
+        return Sponge.game().registry(RegistryTypes.SCULK_SENSOR_STATE);
+    }
+
     private static DefaultedRegistryReference<SculkSensorState> key(final ResourceKey location) {
         return RegistryKey.of(RegistryTypes.SCULK_SENSOR_STATE, location).asDefaultedReference(Sponge::game);
     }

src/main/java/org/spongepowered/api/entity/EntityCategories.java

@@ -27,6 +27,7 @@
 import org.spongepowered.api.ResourceKey;
 import org.spongepowered.api.Sponge;
 import org.spongepowered.api.registry.DefaultedRegistryReference;
+import org.spongepowered.api.registry.Registry;
 import org.spongepowered.api.registry.RegistryKey;
 import org.spongepowered.api.registry.RegistryTypes;
 
@@ -55,6 +56,10 @@ private EntityCategories() {
         throw new AssertionError("You should not be attempting to instantiate this class.");
     }
 
+    public static Registry<EntityCategory> registry() {
+        return Sponge.game().registry(RegistryTypes.ENTITY_CATEGORY);
+    }
+
     private static DefaultedRegistryReference<EntityCategory> key(final ResourceKey location) {
         return RegistryKey.of(RegistryTypes.ENTITY_CATEGORY, location).asDefaultedReference(Sponge::game);
     }