Support letters/roman numbers as ordered lists markers

I'm using this plugin to preview markdown files which I later convert to PDFs with [pandoc](https://pandoc.org/index.html).

Pandoc extends the markdown syntax and allows the use of letters or roman numbers as ordered lists notation, as shown in the following examples

```markdown
a. First item
b. Second item
```

```markdown
1. First item
a. First sub item
b. Second sub item
2. Second item
```

```markdown
1. First item
i. First sub item
ii. Second sub item
2. Second item
```

I found the following plugin [markdown-it-fancy-lists](https://github.com/Moxio/markdown-it-fancy-lists) which extends the syntax of markdown-it to support the pandoc style ordered lists.

I tried adding this plugin in the file `app/pages/index.jsx` by importing the package and using it when creating the `MardownIt` renderer, then I build the plugin with the command `npm run build` but it doesn't work.

Is there a way to support this syntax, at least locally on my config?

If anyone know please let me know,
Martin