[fix] NERDTree automatic refresh #224

[realSaltyFish]

Requirements (please check off with 'x')

• [x] I have read the Contributing Guidelines
• [x] I have read or at least glanced at the FAQ
• [x] I have read or at least glanced at the Wiki

Note: The link to the Contributing Guidelines is broken.

What does this Pull Request (PR) do?

It fixes the bug reported in #224.

How should this be manually tested?

After applying this update, open NERDTree and create a new file. NERDTree will now automatically refresh and show the icon for the new file.

Any background context you can provide?

NERDTree buffers have buftype="nofile", so the CursorHoldUpdate() function will return prematurely when a NERDTree buffer is focused. This PR adds a buftype detection for NERDTree, preventing the return.

What are the relevant tickets (if any)?

#224

[ryanoasis]

Great and appreciate the contribution 🥇

I will have to pull it down and test it out...

Note: The link to the Contributing Guidelines is broken.

Thanks for catching that! Fixed!

[realSaltyFish]

Hi, I added a commit to fix the style issues. Please review it, thanks!

[ryanoasis]

Sorry, I want to test this out locally. Need to get caught up

[cizordj]

I'm gonna help testing it out because I am having this issue as well

[cizordj]

I've been using this for a while and it does solve the problem, however it takes 5 or more seconds to refresh the icons and when I create new files in the root directory it doesn't refresh the icon sometimes.

[parkgang]

I'm waiting for that issue to be resolved. How is it going?

[cizordj]

@parkgang I'm no longer using nerd tree but you can try using this one instead: https://github.com/nvim-tree/nvim-tree.lua