Add :version to ob-picolisp.el option.

lisp/ob-picolisp.el

@@ -76,6 +76,7 @@
 (defcustom org-babel-picolisp-cmd "pil"
   "Name of command used to evaluate picolisp blocks."
   :group 'org-babel
+  :version "24.1"
   :type 'string)
 
 (defun org-babel-expand-body:picolisp (body params &optional processed-params)