Exclusion of `_navbar.md` does not work in docsify-auto-sidebar

[mariocarpente]

I have the following directory structure

docs
├──1-Welcome/
├──2-Onboarding/
├──3-Tools/
├──4-Projects/
├──5-IDi/
├──_docsify/
├──favicon.ico
├──index.html
├──_media/
├──_navbar.md
├──README.md
└──_sidebar.md

when running

docsify-auto-sidebar -d docs

the _navbar.md is added as the last section of _sidebar.md

  - [_navbar](/_navbar.md)

It is possible that this change will fix it:

let ignores = /node_modules|^\..*|^_sidebar\.md$|^_navbar\.md$|^_coverpage\.md$|_docsify/;