fix(type): add "isSortable" to SmartFieldOptions interface (#936)

Author: arnaud-moncel

types/index.d.ts

@@ -280,6 +280,7 @@ export interface SmartFieldOptions {
   description?: string;
   type: FieldType;
   isFilterable?: boolean;
+  isSortable?: boolean;
   isReadOnly?: boolean;
   isRequired?: boolean;
   reference?: string;