⬆️ Update serde_json to v1.0.120

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
serde_json	dev-dependencies	patch	1.0.119 -> 1.0.120

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Release Notes

serde-rs/json (serde_json)

### [`v1.0.120`](https://togithub.com/serde-rs/json/releases/tag/v1.0.120) [Compare Source](https://togithub.com/serde-rs/json/compare/v1.0.119...v1.0.120) - Correctly specify required version of `indexmap` dependency ([#​1152](https://togithub.com/serde-rs/json/issues/1152), thanks [@​cforycki](https://togithub.com/cforycki))

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