fix(deps): update rust crate serde to 1.0.199

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
serde (source)	dependencies	patch	1.0.198 -> 1.0.199

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Release Notes

serde-rs/serde (serde)

v1.0.199

Compare Source

• Fix ambiguous associated item when forward_to_deserialize_any! is used on an enum with Error variant (#​2732, thanks @​aatifsyed)

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