Update Rust crate test-case to v3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
test-case	dev-dependencies	major	2.2.2 -> 3.0.0

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Release Notes

frondeus/test-case (test-case)

v3.3.1

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Fixes

• Avoid emitting additional misleading error messages by proc-macro2-diagnostics (#​138)

v3.3.0

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Features

• Allow comments in test-matrix macro (#​132)

Improvements

• Drop proc-macro-error dependency & improve error messages (#​136)

v3.2.1

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Improvements

• Update syn dependency to 2.0
• Ensure that test-case selects correct version of it's core and macros subcrates

v3.2.0

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Features

• Add test_matrix macro: generates test cases from Cartesian product of possible test function argument values (#​128)

Improvements

• Retain allow attributes on test functions (#​127)

v3.1.0

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Features

• Copy attribute span to generated test functions so that IDEs recognize them properly as individual tests

Improvements

• Added LICENSE file to child crates

v3.0.0

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[IMPORTANT] Starting with 3.0 release we are changing test-case MSRV policy to support only 3 latest stable releases.

Improvements

• Split out functional parts of test-case-macros crate into test-case-core for easy reuse by external libraries

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