Update mocha to version 3.1.2 🚀

[greenkeeperio-bot]

Hello lovely humans,

mocha just published its new version 3.1.2.

State	Update 🚀
Dependency	mocha
New version	3.1.2
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 mocha.
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

3.1.2 / 2016-10-10

🐛 Bug Fix

• #2528: Recovery gracefully if an Error's stack property isn't writable ([@boneskull])

---

The new version differs by 40 commits .

• 205e31b Release v3.1.2
• 2ceb9f2 rebuild mocha.js [ci skip]
• e2274b4 update CHANGELOG.md [ci skip]
• 36184aa recover gracefully if stack is not writable; closes #2528
• 5b83625 Release v3.1.1
• 138cadd rebuild mocha.js [ci skip]
• db04179 update CHANGELOG for v3.1.1 [ci skip]
• 2bb2b9f lint the hell out of the javascript; closes #2525
• 1c72d5c use Chrome for browser tests when run on macOS Sierra; closes #2524
• d62b2b8 use semistandard
• b99e9b3 remove errant debug in test/integration/only.spec.js
• a40f28d Merge branch 'fix-1417-multiple-done-calls' of https://github.com/frankleonrose/mocha into pull/2059
• 9915dfb Release v3.1.0
• 037cdae build dist for v3.1.0
• 44a031b CHANGELOG for v3.1.0 [ci skip]

There are 40 commits in total. See the full diff.

---

This pull request was created by greenkeeper.io.

_{Tired of seeing this sponsor message? ⚡ greenkeeper upgrade}

[coveralls]

Coverage remained the same at 100.0% when pulling 87faede on greenkeeper-mocha-3.1.2 into d199aa4 on dev.

[coveralls]

Coverage remained the same at 100.0% when pulling 87faede on greenkeeper-mocha-3.1.2 into d199aa4 on dev.

[coveralls]

Coverage remained the same at 100.0% when pulling 87faede on greenkeeper-mocha-3.1.2 into d199aa4 on dev.