Update sinon to version 2.3.0 🚀

[greenkeeperio-bot]

🚨🔥⚠️ Action required: Switch to the new Greenkeeper now! 🚨🔥⚠️
This version of Greenkeper will be shutdown on May 31st.
With Integrations first-class bot support landed on GitHub and we’ve rewritten Greenkeeper to take full advantage of it. Simpler setup, fewer pull-requests, faster than ever.

---

Hello lovely humans,

sinon just published its new version 2.3.0.

State	Update 🚀
Dependency	sinon
New version	2.3.0
Type	devDependency

This version is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of sinon.
Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

Do you have any ideas how I could improve these pull requests? Did I report anything you think isn’t right?
Are you unsure about how things are supposed to work?

There is a collection of frequently asked questions and while I’m just a bot, there is a group of people who are happy to teach me new things. Let them know.

Good luck with your project ✨

You rock!

🌴

---

GitHub Release

• 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()

---

The new version differs by 715 commits (ahead by 715, behind by 25).

• 64d51be Update docs/changelog.md and set new release id in docs/_config.yml
• d4b30b0 Add release documentation for v2.3.0
• 8d64248 2.3.0
• e137139 Update Changelog.txt and AUTHORS for new release
• 55dc491 Merge pull request #1416 from lucasfcosta/refactor-sandbox-stub
• fb514cf Merge pull request #1415 from mroderick/style-improvements
• 06bf652 Merge pull request #1414 from mroderick/add-related-libraries-to-how-to-page
• 746de3f Force fenced code blocks to use smaller font
• 1602e00 Improve styling of h4
• 46fd81b Remove deprecation warning from tests for old API
• 454e0fd Add missing final dot to sandbox docs
• 0ea3e17 Add docs for stub.value
• c89fb21 Deprecate stubbing sandbox value in favor of value behavior
• dbefd45 Name restore function on stubNonFunctionProperty
• fe3b9ac Add related libraries section to How To page

There are 250 commits in total. See the full diff.