Drop emacs 25 support

Author: ericdallo

lsp-treemacs.el

@@ -4,7 +4,7 @@
 
 ;; Author: Ivan Yonchovski
 ;; Keywords: languages
-;; Package-Requires: ((emacs "25.1") (dash "2.14.1") (dash-functional "2.14.1") (f "0.20.0") (ht "2.0") (treemacs "2.5") (lsp-mode "6.0"))
+;; Package-Requires: ((emacs "26.1") (dash "2.14.1") (dash-functional "2.14.1") (f "0.20.0") (ht "2.0") (treemacs "2.5") (lsp-mode "6.0"))
 ;; Homepage: https://github.com/emacs-lsp/lsp-treemacs
 ;; Version: 0.2