chore: move away from var

Author: sendilkumarn

lib/utils/group-helper.js

@@ -20,7 +20,7 @@ class GroupHelper {
         });
     }
     mergeRecursive(acc, curr) {
-        for (var p in curr) {
+        for (const p in curr) {
             try {
                 // Property in destination object set; update its value.
                 if (curr[p].constructor == Object) {
@@ -40,7 +40,7 @@ class GroupHelper {
         if (!arr) {
             return;
         }
-        var result = {};
+        const result = {};
         let arrLength = arr.length;
         for (let i = 0; i < arrLength; i++) {
             let key = Object.keys(arr[i])[0];