Update version to 2.6.1

backend/DEVELOPER

@@ -59,12 +59,18 @@ composite.c:
 	CC-B Composite Symbology
 	CC-C Composite Symbology
 
+dotcode.c:
+        Dot Code
+
 dm200.c:
 	Data Matrix ECC 200
 
 gridmtx.c:
 	Grid Matrix
 
+hanxin.c:
+        Han Xin Code
+
 imail.c:
 	USPS OneCode (Intelligent Mail)
 
@@ -100,6 +106,7 @@ postal.c:
 qr.c:
 	QR Code
 	Micro QR Code
+        UPNQR
 
 rss.c:
 	GS1 DataBar (DataBar-14) (RSS-14)