Add configuration for captured mime types.

[tpapp]

Fixes #182.

[fredrikekre]

Which markdown parser/renderer are you using that can handle svgs embedded like this? Maybe it is standard, but I don't think Documenter handles it for example?

[tpapp]

Sorry I don't understand the question, svgs generated by this PR are not embedded but end up as links ![](somefile.svg).

[fredrikekre]

Yea, thats what I meant. Does that work in e.g. Documenter?

[tpapp]

It works with Franklin, which is my intended use case. See screenshot.

[fredrikekre]

Maybe it can be default then for the Franklin-flavor?

[tpapp]

I think it works with Documenter.jl too (screenshot below).

Unless there is a case where it does not work (but the other formats do), I would just make it a default for all flavors.

[fredrikekre]

Yea, lets do that.

[tpapp]

Done. If you merge this, can you please make a release?

[fredrikekre]

Thanks.