[REFACTOR] [Hacker Rank] Interview Preparation Kit: Search: Swap Nodes [Algo].

* Adjusted the interface to match what hackerrank expects.

Author: sir-gon

src/hackerrank/interview_preparation_kit/search/swap_nodes_algo.ts

@@ -97,7 +97,7 @@ export class Tree {
   }
 }
 
-export function swapNodes(indexes: number[][], queries: number[]): number[][] {
+function swapNodes(indexes: number[][], queries: number[]): number[][] {
   const tree: Tree = new Tree(indexes);
   let nodeCollector: Record<number, Node<number>[]> = tree.getCollector();
   const output: number[][] = [];