feat: remove outdated id and parentId typings

Author: philipstanislaus

src/arrayToTree.ts

@@ -1,12 +1,8 @@
 export interface Item {
-  id?: string | number;
-  parentId?: string | number | null;
   [key: string]: any;
 }
 
 export interface TreeItem {
-  id?: string | number;
-  parentId?: string | number | null;
   [key: string]: Item | TreeItem[] | any;
 }