[Pkg-rust-maintainers] Bug#1022233: librust-tracing-subscriber-dev: impossible to install

[Peter Green]

> 
> The following packages have unmet dependencies:
>  librust-tracing-subscriber-dev : Depends: librust-tracing-serde-0.1+valuable-dev (>= 0.1.3-~~)
>                                   Depends: librust-valuable-serde-0.1-dev but it is not installable
> E: Unable to correct problems, you have held broken packages.

rust-valuable-serde is in NEW