Please provide feature kv_unstable_serde, needed for packages I am preparing for Debian.
This requires the serde feature in value-bag to be enabled, which in turn requires sval and serde_fmt sval is currently in NEw https://ftp-master.debian.org/new/rust-sval_1.0.0~alpha.5-1.html I don't see any evidence that anyone is currently working on serde_fmt
