fix sortObject on null

Author: pdesmarets

package.json

@@ -1,7 +1,7 @@
 {
 	"name": "OpenAPI",
-	"version": "0.1.8",
-	"versionDate": "2019-12-13",
+	"version": "0.1.9",
+	"versionDate": "2019-12-20",
 	"author": "hackolade",
 	"engines": {
 		"hackolade": "3.3.0",

reverse_engineering/helpers/commonHelper.js

@@ -46,7 +46,7 @@ const reorderFields = (data, filedOrder) => {
 };
 
 const sortObject = (obj) => {
-    return Object.keys(obj).sort().reduce((acc,key)=>{
+    return Object.keys(obj || {}).sort().reduce((acc,key)=>{
 		if (CHOICES.includes(key)) {
 			acc[key] = obj[key];
 			return acc;