chore(deps): update rust crate dinghy-test to 0.8.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
dinghy-test (source)	dev-dependencies	patch	0.8.1 → 0.8.4

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Release Notes

sonos/dinghy (dinghy-test)

v0.8.4

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Merged pull requests:

• bump macos #​261 (kali)
• use 1.85 for iDevices #​259 (kali)

v0.8.2

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Closed issues:

• Doctests freeze on Rust 1.89 #​255

Merged pull requests:

• 1.85.0 #​258 (kali)
• ignore devices with no udid #​257 (kali)
• 1.89 doctests support #​256 (fredszaq)
• fix ci by holding back some deps #​254 (kali)
• Fix display of android platforms in cargo dinghy all-devices #​250 (fredszaq)

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