fix: changed cursor interface

Author: mariocoski

src/interfaces/Cursor.ts

@@ -1,5 +1,5 @@
 export const start = undefined;
 
-type Cursor = string | typeof start;
+type Cursor = string | typeof start | null;
 
 export default Cursor;

src/interfaces/PaginatedResponse.ts

@@ -1,10 +1,11 @@
+import Cursor from './Cursor';
 import Item from './Item';
 
 export interface PaginationMetadata {
   readonly hasAfter: boolean;
   readonly hasBefore: boolean;
-  readonly after: string | null;
-  readonly before: string | null;
+  readonly after: Cursor;
+  readonly before: Cursor;
   readonly totalCount: number;
 }
 export default interface PaginatedResponse<I extends Item> {