fix: adjust model to remove references from things without references

Fixes #69

src/core/things/Dish.ts

@@ -19,6 +19,7 @@ import {
   SCThingThatCanBeOfferedWithoutReferences,
 } from '../base/ThingThatCanBeOffered';
 import {
+  SCThingWithCategories,
   SCThingWithCategoriesSpecificValues,
   SCThingWithCategoriesTranslatableProperties,
   SCThingWithCategoriesWithoutReferences,
@@ -30,8 +31,9 @@ import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 /**
  * A dish without references
  */
-export interface SCDishWithoutReferences extends SCThingThatCanBeOfferedWithoutReferences,
-  SCThingWithCategoriesWithoutReferences<SCDishCategories, SCThingWithCategoriesSpecificValues> {
+export interface SCDishWithoutReferences
+  extends SCThingThatCanBeOfferedWithoutReferences,
+    SCThingWithCategoriesWithoutReferences<SCDishCategories, SCThingWithCategoriesSpecificValues> {
   /**
    * Additives of the dish
    */
@@ -68,8 +70,9 @@ export interface SCDishWithoutReferences extends SCThingThatCanBeOfferedWithoutR
  *
  * @validatable
  */
-export interface SCDish extends SCDishWithoutReferences,
-  SCThingThatCanBeOffered<SCAcademicPriceGroup> {
+export interface SCDish
+  extends SCDishWithoutReferences, SCThingThatCanBeOffered<SCAcademicPriceGroup>,
+    SCThingWithCategories<SCDishCategories, SCThingWithCategoriesSpecificValues> {
   /**
    * Dishes ("Beilagen") that are served with the dish (if only certain supplement dishes can be taken with a dish)
    */
@@ -165,7 +168,9 @@ export interface SCNutritionInformation {
 /**
  * Meta information about a dish
  */
-export class SCDishMeta extends SCThingMeta implements SCMetaTranslations<SCDish> {
+export class SCDishMeta
+  extends SCThingMeta
+  implements SCMetaTranslations<SCDish> {
   /**
    * Translations of fields
    */