!16 Upgrade to version 1.21

From: @chen-jan 
Reviewed-by: @caodongxia 
Signed-off-by: @caodongxia

tcllib.spec

@@ -3,7 +3,7 @@
 
 Summary:       The standard Tcl library
 Name:          tcllib
-Version:       1.20
+Version:       1.21
 Release:       1
 License:       BSD
 URL:           http://tcllib.sourceforge.net/
@@ -11,7 +11,7 @@ Source:        https://downloads.sourceforge.net/tcllib/%{name}-%{version}.tar.x
 BuildArch:     noarch
 
 Requires:      tcl(abi) = 8.6
-BuildRequires: tcl >= 8.3.1
+BuildRequires: tcl >= 8.6
 
 Patch0001:     0001-Fix-invalid-command-name-log.patch
 
@@ -55,12 +55,16 @@ find %{buildroot}/%{_datadir} -name \*.tcl | xargs chmod 0644
 %{_bindir}/nns*
 %{_bindir}/page
 %{_bindir}/tcldocstrip
+%{_bindir}/mkdoc
 
 %files help
 %doc support/releases/history/README-1.9.txt
 %{_mandir}/mann/*
 
 %changelog
+* Wed Aug 23 2023 chenchen <chen_aka_jan@163.com> - 1.21-1
+- Upgrade to version 1.21
+
 * Tue May 17 2022 liyanan <liyanan32@h-partners.com> - 1.20-1
 - Package update