Allow unicode domain names

[MihaZupan]

Fixes #316

IDNA encoding is not used on standard1.1 and portable as explained here.

[xoofx]

Thanks! I think we should drop support for netstandard1.1 then and switch to the minimum netstandard version supporting this.

[MihaZupan]

Portable as well or only std1.1?

[xoofx]

yeah, we can remove portable as well.

[xoofx]

btw, I wanted to add you as a collaborator of markdig? (instead of a contributor as it is today) you will have a bit more access to the project (moderate issues...etc.), as you have been quite involved, I was wondering if you would be interested?

[MihaZupan]

Of course, thank you :)

[xoofx]

This line can be likely removed:

https://github.com/lunet-io/markdig/blob/f8df3c80e16e98ffe0a0ce8a9a5b7b0f4c345b2f/src/Markdig/Markdown.cs#L20

Haven't checked further, but you can double check (I just did a search on GitHub search, might not be complete!)

[MihaZupan]

I tried, looks like uap10 falls under netstandard11 as far as that check is concerned and it doesn't support the alternative

[xoofx]

I tried, looks like uap10 falls under netstandard11 as far as that check is concerned and it doesn't support the alternative

Han ok

[xoofx]

Oh, also, as I forgot whenever I have to compile the changelog.md, can you add a new line for the next version about this fix in changelog.md (with a WIP on the version so that we know what to integrate)