Update dependency sinon to ^7.4.2

Created by: renovate[bot]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
sinon (source)	devDependencies	patch	^7.4.2	homepage, source

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Release Notes

sinonjs/sinon

v7.4.2

Compare Source

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• Restore sinon.createStubInstance() behaviour (#​2073)
• Fix Typo in migration 6 and updated migration docs for migration from… (#​2074)

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