Update Rust crate serde_json to 1.0.99

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
serde_json	dependencies	patch	1.0.97 -> 1.0.99

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Release Notes

serde-rs/json

### [`v1.0.99`](https://togithub.com/serde-rs/json/releases/tag/v1.0.99) [Compare Source](https://togithub.com/serde-rs/json/compare/v1.0.98...v1.0.99) - Support serializing serde's **option** type in a map key ([#​1030](https://togithub.com/serde-rs/json/issues/1030), thanks [@​LPGhatguy](https://togithub.com/LPGhatguy)) ### [`v1.0.98`](https://togithub.com/serde-rs/json/releases/tag/v1.0.98) [Compare Source](https://togithub.com/serde-rs/json/compare/v1.0.97...v1.0.98) - Update indexmap dependency used by "preserve_order" feature to version 2

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