[draftail-renderer] Feature Request: Support nested list items

[elainen]

Is your feature request related to a problem? Please describe.

Some rich text fields have content with nested list items. Currently, we are only flattening out the list items into one list.

Describe the solution you'd like

Utilize the depth field provided in each block to determine nested list items.

Describe alternatives you've considered

None

Additional context

None

[aamorozov]

Should work now @elainen in @hzcore/draftail-renderer@1.2.0