Update NEWS for 4.3 release

NEWS

@@ -7,10 +7,13 @@ Copyright (C) 2000-2021  Michael Black W9MDB, and others
 Please send Hamlib bug reports to hamlib-developer@lists.sourceforge.net
 
 Version 4.3
-        * 2021-??-??
+        * 2021-08-31
         * libusb-1.0.23 or greater is now required or use --without-libusb
         * Generating documentation now requires GNU source-highlighter.
         * Added IC-575
+        * Less VFO swapping of newer Icom rigs -- zero swapping in WSJTX and JTDX
+        * Dual rotator control in rotctl -R option
+        * Started work on simulators -- very crude right now but usable to debug some things
         * Overhaul of rig split -- reverse split (VFOA=RX VFOB=TX) should work for rigs capable of it
           Starting VFO does not matter -- rig will end up on RX VFO
           S VFOA 1 VFOB