update npm package with markdown-it 10

[Pedro Ivo Hudson]

Hello,

Version 2.1.0 in npm is currently using markdown-it: ^8.0.0, despite the package here in GitHub being updated to ^10.0.0.

I've manually updated in my project, but an official update would be much appreciated!

All the best.

[Pedro Ivo Hudson]

Updated here: 8c3d5e0