Bump minimum Emacs version to 28.1

Author: jcs090218

Eask

@@ -15,7 +15,7 @@
 (source 'jcs-elpa)
 (source 'melpa)
 
-(depends-on "emacs" "27.1")
+(depends-on "emacs" "28.1")
 (depends-on "elenv")
 
 (setq network-security-level 'low)  ; see https://github.com/jcs090218/setup-emacs-windows/issues/156#issuecomment-932956432

jcs-frametitle.el

@@ -6,7 +6,7 @@
 ;; Maintainer: Shen, Jen-Chieh <[email protected]>
 ;; URL: https://github.com/jcs-emacs/jcs-frametitle
 ;; Version: 0.1.0
-;; Package-Requires: ((emacs "26.1") (elenv "0.1.0"))
+;; Package-Requires: ((emacs "28.1") (elenv "0.1.0"))
 ;; Keywords: faces frame-title
 
 ;; This file is not part of GNU Emacs.