UPGRADE.md in quandl_format-0.2.5 vs UPGRADE.md in quandl_format-0.2.6

@@ -1,4 +1,10 @@
+## 0.2.6
+
+* require yaml
+* dont assign data if data is not present
+
+
 ## 0.2.5
 
 * QUGC-40 respond with error status if errors are blank
 * QUGC-37 field names should be case insensitive
 
\ No newline at end of file