fix/ Node requirement of .js at end of imports

data-structures/graph/Graph.js

@@ -1,7 +1,7 @@
 import Iter from 'es-iter';
 import _ from 'lodash';
-import depthFirstSearch from '../../algorithms/depth-first-search/depthFirstSearch';
-import VisitMetadata from './VisitMetadata';
+import depthFirstSearch from '../../algorithms/depth-first-search/depthFirstSearch.js';
+import VisitMetadata from './VisitMetadata.js';
 
 export default class Graph {
   #cycles;

data-structures/graph/GraphVertex.js

@@ -1,4 +1,4 @@
-import LinkedList from '../linked-list/LinkedList';
+import LinkedList from '../linked-list/LinkedList.js';
 
 export default class GraphVertex {
   /**

data-structures/heap/Heap.js

@@ -1,4 +1,4 @@
-import Comparator from '../../utils/comparator/Comparator';
+import Comparator from '../../utils/comparator/Comparator.js';
 
 /**
  * Parent class for Min and Max Heaps.

data-structures/heap/MaxHeap.js

@@ -1,4 +1,4 @@
-import Heap from './Heap';
+import Heap from './Heap.js';
 
 export default class MaxHeap extends Heap {
   /**

data-structures/heap/MinHeap.js

@@ -1,4 +1,4 @@
-import Heap from './Heap';
+import Heap from './Heap.js';
 
 export default class MinHeap extends Heap {
   /**

data-structures/linked-list/LinkedList.js

@@ -1,5 +1,5 @@
-import LinkedListNode from './LinkedListNode';
-import Comparator from '../../utils/comparator/Comparator';
+import LinkedListNode from './LinkedListNode.js';
+import Comparator from '../../utils/comparator/Comparator.js';
 
 export default class LinkedList {
   /**

data-structures/priority-queue/PriorityQueue.js

@@ -1,5 +1,5 @@
-import MinHeap from '../heap/MinHeap';
-import Comparator from '../../utils/comparator/Comparator';
+import MinHeap from '../heap/MinHeap.js';
+import Comparator from '../../utils/comparator/Comparator.js';
 
 // It is the same as min heap except that when comparing two elements
 // we take into account its priority instead of the element's value.

data-structures/queue/Queue.js

@@ -1,4 +1,4 @@
-import LinkedList from '../linked-list/LinkedList';
+import LinkedList from '../linked-list/LinkedList.js';
 
 export default class Queue {
   constructor() {

data-structures/stack/Stack.js

@@ -1,4 +1,4 @@
-import LinkedList from '../linked-list/LinkedList';
+import LinkedList from '../linked-list/LinkedList.js';
 
 export default class Stack {
   constructor() {