fix: Drop support for Emacs 26.x (#448)

Author: jcs090218

.github/workflows/test.yml

@@ -16,7 +16,6 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         emacs-version:
-          - 26.3
           - 27.2
           - 28.2
           - snapshot

Eask

@@ -16,7 +16,7 @@
 (source "gnu")
 (source "melpa")
 
-(depends-on "emacs" "26.1")
+(depends-on "emacs" "27.1")
 (depends-on "lsp-mode")
 (depends-on "markdown-mode")
 (depends-on "dash")

lsp-java.el

@@ -2,7 +2,7 @@
 
 ;; Version: 3.0
 
-;; Package-Requires: ((emacs "25.1") (lsp-mode "6.0") (markdown-mode "2.3") (dash "2.18.0") (f "0.20.0") (ht "2.0") (request "0.3.0") (treemacs "2.5") (dap-mode "0.5"))
+;; Package-Requires: ((emacs "27.1") (lsp-mode "6.0") (markdown-mode "2.3") (dash "2.18.0") (f "0.20.0") (ht "2.0") (request "0.3.0") (treemacs "2.5") (dap-mode "0.5"))
 ;; Keywords: languague, tools
 ;; URL: https://github.com/emacs-lsp/lsp-java