Update dependency sinon to v9.0.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
sinon (source)	devDependencies	patch	9.0.0 -> 9.0.1

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Release Notes

sinonjs/sinon

### [`v9.0.1`](https://togithub.com/sinonjs/sinon/blob/master/CHANGELOG.md#​901--2020-03-10) [Compare Source](https://togithub.com/sinonjs/sinon/compare/v9.0.0...v9.0.1) ================== - Fix [#​2226](https://togithub.com/sinonjs/sinon/issues/2226): restore props defined on prototype chain by deleting

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