tmux versioning attempt

tmux.conf

@@ -1,6 +1,6 @@
 set -g default-terminal "screen-256color"
 set -g base-index 1
-set -g pane-base-index 1
+if-shell '[ "$(tmux -V | awk '{print $2*10}')" -ge 17 ]' 'set -g pane-base-index 1'
 set -g set-titles on
 set -g status-keys vi
 # Faster Command Sequences