increase version number, just to make version sort working

main.go

@@ -10,7 +10,7 @@ import (
 // Some options here. Would be improved in beta release.
 const DEDUCT_PKGNAME_FROM_VARNAME = true
 const USE_PROJECT_NETVER_INSTEAD_OF_HINTPATH_NETVER = false
-const OPENXT_VERSION = "1.2-4"
+const OPENXT_VERSION = "1.3-1"
 
 func print_help_and_exit() {
 	println("Usage: openxt <subcommand> [options...]")