Update sinon to version 1.17.2 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

sinon just published its new version 1.17.2, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of sinon – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

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The new version differs by 3 commits .

• aa333b7 1.17.2
• da9c8a4 Merge pull request #870 from sinonjs/fix-867-backport
• 15b5276 Fix #867: Walk properties only once

See the full diff.

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