fix: adjust model to remove references from things without references

Fixes #69

src/core/things/Book.ts

@@ -26,7 +26,8 @@ import {SCPersonWithoutReferences} from './Person';
 /**
  * A book without references
  */
-export interface SCBookWithoutReferences extends SCCreativeWorkWithoutReferences {
+export interface SCBookWithoutReferences
+  extends SCCreativeWorkWithoutReferences {
   /**
    * Edition of a book
    */
@@ -58,7 +59,8 @@ export interface SCBookWithoutReferences extends SCCreativeWorkWithoutReferences
  *
  * @validatable
  */
-export interface SCBook extends SCCreativeWork, SCBookWithoutReferences {
+export interface SCBook
+  extends SCCreativeWork, SCBookWithoutReferences {
   /**
    * Authors of the creative work
    */
@@ -95,23 +97,23 @@ export class SCBookMeta extends SCThingMeta implements SCMetaTranslations<SCBook
    */
   fieldTranslations = {
     de: {
-      ... SCCreativeWorkMeta.getInstance().fieldTranslations.de,
+      ...SCCreativeWorkMeta.getInstance().fieldTranslations.de,
     },
     en: {
-      ... SCCreativeWorkMeta.getInstance().fieldTranslations.en,
+      ...SCCreativeWorkMeta.getInstance().fieldTranslations.en,
     },
   };
 
   /**
    * Translations of values of fields
    */
-  fieldValueTranslations  = {
+  fieldValueTranslations = {
     de: {
-      ... SCCreativeWorkMeta.getInstance().fieldValueTranslations.de,
+      ...SCCreativeWorkMeta.getInstance().fieldValueTranslations.de,
       type: 'Buch',
     },
     en: {
-      ... SCCreativeWorkMeta.getInstance().fieldValueTranslations.en,
+      ...SCCreativeWorkMeta.getInstance().fieldValueTranslations.en,
       type: SCThingType.Book,
     },
   };