chore(deps): update dependency vscode-test to v1.5.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
vscode-test	1.5.0 -> 1.5.1

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Release Notes

Microsoft/vscode-test

### [`v1.5.1`](https://togithub.com/Microsoft/vscode-test/blob/master/CHANGELOG.md#​151--2021-01-25) [Compare Source](https://togithub.com/Microsoft/vscode-test/compare/v1.5.0...v1.5.1) - Fix wrong http proxy agent used [#​82](https://togithub.com/microsoft/vscode-test/issues/82)

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[sleistner]

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