eshell-atuin: add flag to turn off --duration (#3)

README.org

@@ -19,6 +19,11 @@ The package isn't yet available anywhere but in this repository. My preferred wa
 
 Alternatively, clone the repository, add it to the =load-path=, and =require= the package.
 
+If your version of =atuin= is less than 18, turn off saving command durations:
+#+begin_src emacs-lisp
+(setq eshell-atuin-save-duration nil)
+#+end_src
+
 * Configuration
 If your =atuin= binary is located in a place unknown to =executable-find=, set the =atuin-executable= variable.
 

eshell-atuin.el

@@ -81,6 +81,13 @@ will not work.
     (when (fboundp #'eshell-atuin--history-reset)
       (eshell-atuin--history-reset))))
 
+(defcustom eshell-atuin-save-duration t
+  "Whether to save command duration.
+
+Set to nil if your atuin version is less than 18."
+  :group 'eshell-atuin
+  :type 'boolean)
+
 (defcustom eshell-atuin-history-format "%c"
   "How to format history items.
 
@@ -154,7 +161,8 @@ of the command."
             `(,eshell-atuin-executable
               "history" "end"
               "--exit" ,(number-to-string eshell-last-command-status)
-              ,@(when eshell-atuin--last-command-start
+              ,@(when (and eshell-atuin--last-command-start
+                           eshell-atuin-save-duration)
                   (list
                    "--duration"
                    (prog1