i3status-rust: Set notifier

Without this, we do not get a message window via mako and need to
check in on the pomodoro timer in status bar manually.

i3status-rust/.config/i3status-rust/config.toml

@@ -7,6 +7,7 @@ length = 25
 break_length = 5
 message = "Take a break!"
 break_message = "Back to work!"
+notifier = "notifysend"
 
 [[block]]
 block = "time"