chore(deps): update tests

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
xunit	2.6.6 -> 2.7.0
xunit.runner.visualstudio	2.5.6 -> 2.5.7

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Release Notes

xunit/xunit (xunit)

### [`v2.7.0`](https://togithub.com/xunit/xunit/compare/2.6.6...2.7.0) [Compare Source](https://togithub.com/xunit/xunit/compare/2.6.6...2.7.0)

xunit/visualstudio.xunit (xunit.runner.visualstudio)

### [`v2.5.7`](https://togithub.com/xunit/visualstudio.xunit/compare/2.5.6...2.5.7) [Compare Source](https://togithub.com/xunit/visualstudio.xunit/compare/2.5.6...2.5.7)

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