CHANGELOG.md in xsys-0.3.0 vs CHANGELOG.md in xsys-0.3.1

@@ -179,5 +179,9 @@
 * Added last price update to products
 
 ## v0.3.0
 
 * Added search by product ids and renamed product search method
+
+## v0.3.1
+
+* Return null if product not existing