fix: 🐛 fixed update entry which was failing

the function cleanAssets was checking with null value

Author: harshithad0703

lib/entity.js

@@ -317,10 +317,10 @@ function isAsset (data) {
 }
 
 export function cleanAssets (data) {
-  if (data && typeof data === "object" && Object.keys(data).length > 0) {
+  if (data && typeof data === "object") {
     const keys = Object.keys(data);
     for (const key of keys) {
-      if (typeof data[key] === "object" && Object.keys(data[key]).length > 0) {
+      if (data[key] !== null && data[key] !== undefined && typeof data[key] === "object") {
         if (isAsset(data[key])) {
           data[key] = (Array.isArray(data[key])) ? data[key].map(element => element.uid) : data[key].uid;
         } else {