Update Rust crate libtest-mimic to 0.8.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
libtest-mimic	dependencies	minor	0.6.0 → 0.8.0

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Release Notes

LukasKalbertodt/libtest-mimic (libtest-mimic)

v0.8.1

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• Fix bug when executing trial on fewer threads than trials (thanks @​hanna-kruppe for catching this)

v0.8.0

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• Breaking: bump MSRV to 1.65
• Remove threadpool dependency, getting rid of memory leaks observed when running under valgrind (thanks @​Felix-El) in #​46
• Switch from termcolor to anstream to get rid of duplicate dependencies (thanks @​hanna-kruppe) in #​44
• Bump dev-dependency fastrand to 2 (thanks @​alexanderkjall) in #​47
• Fix outdated docs

v0.7.3

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• Default to single-threaded tests for WebAssembly (thanks @​alexcrichton) in #​41

v0.7.2

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• Fix Conclusion::exit_code (logic was inverted in 0.7.1)

v0.7.1

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• Add Conclusion::exit_code and note about destructors/cleanup to docs of exit and exit_if_failed e938e537e

v0.7.0

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• Also check kind when filtering tests (thanks @​sunshowers) in #​30
  • This is potentially breaking as additional or fewer tests might be executed in some situations.
• Add JSON format output (thanks @​PaulWagener and @​t-moe) in #​35
• Add no-op flags to add CLI compatibility for IntellJ Rust (thanks @​Dinnerbone and @​t-moe) #​28 / 70cdc55

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