chore(deps): update dependency sinon to v2.4.1

This MR contains the following updates:

Package	Type	Update	Change
sinon (source)	devDependencies	minor	2.2.0 -> 2.4.1

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Release Notes

sinonjs/sinon (sinon)

v2.4.1

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• stub#withArgs: set promiseLibrary correctly (#​1497)

v2.4.0

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• Allow anonymous mock functions to be named

v2.3.8

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• Fix 1474: propagates promiseLibrary to new stub behaviors (#​1484)

v2.3.7

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• Fix #​1476: spy.withArgs(args...).firstCall is broken

v2.3.6

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• Fix #​1274: spy.withArgs(args...).callCount is incorrect

v2.3.5

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• Check configurable on a prop before creating (fixes #​1456) (#​1462)

v2.3.4

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• Fix #​1372: make sandbox.resetHistory also reset spies (#​1424)

v2.3.3

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• Fix #​1445: make stubbing of static function properties possible

v2.3.2

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• Fix failing sandbox.resetBehavior() (#​1428)
• Fix restoring getters/setters/values for previously unexisting props (#​1419)
• Called in order takes callCount into account. Closes #​1398.

v2.3.1

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• Make calledAfter symmetric with calledBefore (#​1407)

v2.3.0

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• Allow stubbing of accessors with and without sandbox (#​1416)
• add throwsArg(index) to stubs (#​1319)
• Fix: forEach() requires 'this' argument (#​1356)
• Only reset history when calling resetHistory()

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