`term::emit`'s `writer` argument does not behave additively wrt features.

[cwfitzgerald]

Originally reported as gfx-rs/wgpu#7915
Connected to #374
cc @bushrat011899

Hello! The writer argument to term::emit can cause compilation to fail when additional features are added. https://github.com/brendanzab/codespan/blob/master/codespan-reporting/src/term.rs#L28-L30 when there are no features enabled, you can pass in a String and it will compile. But enable the termcolor feature, a string will no longer be allowed. Similarly you can put a fmt::Write type which does not impl io::Write into the slot, which will cause a compilation failure when the std feature is added by another crate.

[kaleidawave]

Yes, termcolor::WriteColor is not a superset of std::io::Write (and also different to core::fmt::Write) and so it can break when mixed.

Apologies that this has landed in the latest release. Will have a think about how to fix. May require an intermediate trait.

[kaleidawave]

I believe that this area is changed by #387. So maybe worth making merging that change first rather than trying to add a hack-fix for this now

[npetrangelo]

I ran into this as well. Do you recommend using a 25.x.x version of wgpu until this is fixed?