feat: Drop support for 26.x

Author: jcs090218

.github/workflows/test.yml

@@ -20,7 +20,6 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         emacs-version:
-          - 26.3
           - 27.2
           - 28.2
           - 29.2

Eask

@@ -12,7 +12,7 @@
 (source 'gnu)
 (source 'melpa)
 
-(depends-on "emacs" "26.1")
+(depends-on "emacs" "27.1")
 (depends-on "flycheck")
 (depends-on "dart-mode")
 

flycheck-dart.el

@@ -7,7 +7,7 @@
 ;; Maintainer: Shen, Jen-Chieh <[email protected]>
 ;; URL: https://github.com/jcs090218/flycheck-dart
 ;; Version: 0.1.0
-;; Package-Requires: ((emacs "26.1") (flycheck "0.22") (dart-mode "0.11"))
+;; Package-Requires: ((emacs "27.1") (flycheck "0.22") (dart-mode "0.11"))
 ;; Keywords: tools
 
 ;; This file is not part of GNU Emacs.