fix(deps): update rust crate serde to 1.0.187

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
serde (source)	dependencies	patch	1.0.186 -> 1.0.187

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Release Notes

serde-rs/serde (serde)

### [`v1.0.187`](https://togithub.com/serde-rs/serde/releases/tag/v1.0.187) [Compare Source](https://togithub.com/serde-rs/serde/compare/v1.0.186...v1.0.187) - Remove support for Emscripten targets on rustc older than 1.40 ([#​2600](https://togithub.com/serde-rs/serde/issues/2600))

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