chore(deps): update dependency sinon to v7.2.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
sinon	devDependencies	minor	7.1.1 -> 7.2.0	homepage, source

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Release Notes

sinonjs/sinon

### [`v7.2.0`](https://renovatebot.com/gh/sinonjs/sinon/blob/master/CHANGELOG.md#​720--2018-12-10) [Compare Source](https://renovatebot.com/gh/sinonjs/sinon/compare/v7.1.1...v7.2.0) ================== - Upgrade to samsam 3 ([#​1955](https://renovatebot.com/gh/sinonjs/sinon/issues/1955)) - Rename History.md to CHANGELOG.md

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[poet-ci]

:tada: This PR is included in version 5.1.15 :tada:

The release is available on:

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