Update program version to 4.21.0 build 267

!!!NOTE
The version number was actually reduced from v4.22.2 because that
number was entered in error when VersionInfo.vi-inc was first created:
the version should have been v4.20.2
!!!

Author: delphidabbler

Src/VersionInfo.vi-inc

@@ -1,8 +1,8 @@
 # CodeSnip Version Information Macros for Including in .vi files
 
 # Version & build numbers
-version=4.22.2
-build=266
+version=4.21.0
+build=267
 
 # String file information
 copyright=Copyright © P.D.Johnson, 2005-<YEAR>.