lib: Update no-op message in case of stable update

lib/helpers.bash

@@ -238,9 +238,13 @@ _bash-it_update-() {
         echo -e "\033[91mPlease choose y or n.\033[m"
         ;;
       esac
+  else
+    if [[ ${version} == "stable" ]]; then
+      echo "You're on the latest stable version. If you want to check out the latest 'dev' version, please run \"bash-it update dev\""
     else
       echo "Bash-it is up to date, nothing to do!"
     fi
+  fi
   cd "${old_pwd}" &> /dev/null || return
 }