Bump serde_json from 1.0.35 to 1.0.36 in /rust (#22)

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Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.35 to 1.0.36.
<details>
<summary>Release notes</summary>

*Sourced from [serde_json's releases](https://github.com/serde-rs/json/releases).*

> ## v1.0.36
> - Fix serialization of maps with u128 key ([#511](https://github-redirect.dependabot.com/serde-rs/json/issues/511))
</details>
<details>
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- [`fa8e2b1`](serde-rs/json@fa8e2b1) Release 1.0.36
- [`dd887ed`](serde-rs/json@dd887ed) Merge pull request [#512](https://github-redirect.dependabot.com/serde-rs/json/issues/512) from dtolnay/128key
- [`7e4427c`](serde-rs/json@7e4427c) Quotes around u128 in map key
- See full diff in [compare view](serde-rs/json@v1.0.35...v1.0.36)
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rust/Cargo.toml

@@ -31,5 +31,5 @@ rust-ini = "0.13.0"
 clone_all = "0.1.1"
 either = "1.5.0"
 lazy_static = "1.2.0"
-serde_json = "1.0.35"
+serde_json = "1.0.36"
 float-cmp = "0.4.0"