fix(deps): update rust crate hyper-util to v0.1.20

[elmarx]

This PR contains the following updates:

Package	Type	Update	Change
hyper-util (source)	dependencies	patch	0.1.16 -> 0.1.20

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Release Notes

hyperium/hyper-util (hyper-util)

v0.1.20

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• Fix proxy::Matcher to properly match domains regardless of casing
• Fix system proxy matcher dependency on macOS when used in sandboxed environements.
• Increased MSRV to 1.64.

v0.1.19

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• Add client::pool module for composable pools. Enable with the client-pool feature.
• Add pool::singleton for sharing a single cloneable connection.
• Add pool::cache for caching a list of connections.
• Add pool::negotiate for combining two pools with upgrade and fallback negotiation.
• Add pool::map for customizable mapping of keys and connections.

v0.1.18

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• Fix rt::TokioTimer to support Tokio's paused time.
• Fix client::proxy::match::Matcher to parse auth without passwords.

v0.1.17

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• Fix legacy::Client to allow absolute-form URIs when Connected::proxy(true) is passed and the scheme is https.

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