[With possible workaround] Node warning when opening the preview

[kqwyf]

Describe the bug
When opening the preview, a warning occurs: Warning: Accessing non-existent property 'padLevels' of module exports inside circular dependency. While the preview still works, this is very annoying.

To Reproduce
Steps to reproduce the behavior:

1. Install the plugin.
2. Set let g:mkdp_auto_start = 1. (didn't test if it still occurs when this variable is 0)
3. Open a Markdown document.

Expected behavior
Preview works without warning prompt.

Environment:

• OS: Manjaro KDE (2021.05.07)
• Nodejs: v16.0.0
• npm: 7.12.0
• yarn: 1.22.10

Possible solution/workaround:

• Run cd app && yarn upgrade after installation.

The reason seems to be an old version of package winston, which is required by package neovim. See winston#1797. A simple cd app && yarn upgrade get me on the way.

Since I'm not familiar with nodejs programming, I'm not sure whether this is an elegant solution. Hoping anyone provide a final solution and commit it. Thanks!

[iamcco]

fix with latest version