Try to fix broken build and add an Emacs badge

Author: Townk

README.org

@@ -1,5 +1,6 @@
 #+TITLE:Org Outline Tree
 
+[[https://www.gnu.org/software/emacs/][https://img.shields.io/badge/Emacs-27.1+-blueviolet.svg?logo=GNU%20Emacs&logoColor=white]]
 [[https://github.com/Townk/org-ol-tree/blob/main/LICENSE][http://img.shields.io/badge/license-MIT-brightgreen.svg]] [[https://github.com/Townk/org-ol-tree/actions/workflows/tests.yml][https://github.com/Townk/org-ol-tree/actions/workflows/tests.yml/badge.svg]] [[https://codecov.io/gh/Townk/org-ol-tree][https://codecov.io/gh/Townk/org-ol-tree/branch/main/graph/badge.svg?token=XL88FR24XT]]
 
 This package offers an Org mode outline window that does not use indirect buffers.

org-ol-tree.el

@@ -8,7 +8,7 @@
 ;; Version: 0.0.1
 ;; Keywords: org, org-mode, outline, tree, tree-view, treeview, treemacs
 ;; Homepage: https://github.com/Townk/org-ol-tree
-;; Package-Requires: ((org "9.5") (treemacs "2.8") (dash "2.18.1") (s "1.12.0") (ht "2.3") (cfrs "1.5.4") (seq) (cl-lib))
+;; Package-Requires: ((org "9.4") (treemacs "2.8") (dash "2.18.1") (s "1.12.0") (ht "2.3") (cfrs "1.5.4") (seq) (cl-lib))
 ;;
 ;; This file is not part of GNU Emacs.
 ;;