[Fix #499] Extract the version from the package header

Author: bbatsov

clojure-mode.el

@@ -69,6 +69,7 @@
 (require 'newcomment)
 (require 'align)
 (require 'subr-x)
+(require 'lisp-mnt)
 
 (declare-function lisp-fill-paragraph  "lisp-mode" (&optional justify))
 
@@ -79,7 +80,7 @@
   :link '(url-link :tag "GitHub" "https://github.com/clojure-emacs/clojure-mode")
   :link '(emacs-commentary-link :tag "Commentary" "clojure-mode"))
 
-(defconst clojure-mode-version "5.10.0-snapshot"
+(defconst clojure-mode-version (lm-version)
   "The current version of `clojure-mode'.")
 
 (defface clojure-keyword-face