add genres to book list

src/pages/Books/BooksList.vue

@@ -88,6 +88,7 @@ export default {
         { key: 'title', label: 'Title', sortable: true },
         { key: 'language', label: 'Language', sortable: true },
         { key: 'authors', label: 'Authors', sortable: true },
+        { key: 'genres', label: 'Genres', sortable: true },
         { key: 'serie', label: 'Serie', sortable: true }
       ],
       bookItems: [],

src/utils/TransformerUtils.js

@@ -3,7 +3,8 @@ export default {
     const types = {
       authors: 'author',
       books: 'book',
-      serie: 'book_serie'
+      serie: 'book_serie',
+      genres: 'genre'
     }
     return types[key]
   },
@@ -11,7 +12,8 @@ export default {
     const types = {
       authors: true,
       books: true,
-      serie: false
+      serie: false,
+      genres: true
     }
     return types[key]
   }