ESLint: fix indentation

src/app/core/shared/non-hierarchical-browse-definition.ts

@@ -11,14 +11,14 @@ import { BrowseDefinition } from './browse-definition.model';
 export abstract class NonHierarchicalBrowseDefinition extends BrowseDefinition {
 
   @autoserialize
-  sortOptions: SortOption[];
+    sortOptions: SortOption[];
 
   @autoserializeAs('order')
-  defaultSortOrder: string;
+    defaultSortOrder: string;
 
   @autoserializeAs('metadata')
-  metadataKeys: string[];
+    metadataKeys: string[];
 
   @autoserialize
-  dataType: BrowseByDataType;
+    dataType: BrowseByDataType;
 }