[deps]: Update Rust crate wiremock to 0.6.0 (#606)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [wiremock](https://togithub.com/LukeMathWalker/wiremock-rs) |
dev-dependencies | minor | `0.5.22` -> `0.6.0` |

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### Release Notes

<details>
<summary>LukeMathWalker/wiremock-rs (wiremock)</summary>

###
[`v0.6.0`](https://togithub.com/LukeMathWalker/wiremock-rs/compare/v0.6.0-rc.3...v0.6.0)

[Compare
Source](https://togithub.com/LukeMathWalker/wiremock-rs/compare/v0.5.22...v0.6.0)

</details>

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