Update mocha to version 2.4.2 🚀

[greenkeeperio-bot]

Hello 👋

🚀🚀🚀

mocha just published its new version 2.4.2, 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 mocha – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging 🌴

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The new version differs by 72 commits (ahead by 72, behind by 1).

• 753a511 Release v2.4.2
• 8aafbb5 rebuild
• 337e863 update CHANGELOG; add link to CHANGELOG in README.md
• f87395c Merge pull request #2074 from gyandeeps/master
• d8ffcfb Fix: reporters with chalk functions (fixes #2073)
• eef307d Merge pull request #2072 from thedark1337/master
• 9f3774f Fix #2071: Removed color code to fix Chalk colors
• a661e6c Merge pull request #2053 from mislav/window-vs-global
• aa550e1 Release v2.4.1
• 33b7261 rebuild mocha.js
• 761fa17 rename HISTORY.md => CHANGELOG.md
• 623c9b6 increase retry test timeout
• f00c197 Merge pull request #2068 from danielstjules/dstjules/test-body
• d59cc6c Fix #2067: HTML/DOC reporter regression with async failures
• a25ac95 Build browser mocha for 2.4.0

There are 72 commits in total. See the full diff.

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[bjornharrtell]

@fredj - this seem to have made the test output not nice on Travis, see https://travis-ci.org/openlayers/ol3/builds/105162119 compared to https://travis-ci.org/openlayers/ol3/builds/105161059.

Strangely the output is fine when run locally for me.

[tschaub]

@bjornharrtell experimenting with color suppression in #4745. With 551a2ed, I'm not seeing colors in my terminal. Are you?

[bjornharrtell]

Ah yes didn't notice before but yes no color with commit 551a2ed.

I'm not sure what is going on with mocha, they released 2.4.3 with fixes that might be related but that seem to make the build stall completely - #4743.

[fredj]

Sorry I didn't look at the Travis output ...

[tschaub]

No problem @fredj - I don't think I would have either. Though I'm going to look at Travis more closely for future upgrades.

Before upgrading Mocha, we need to make sure that at least mochajs/mocha#2080 is addressed. Ideally, we wouldn't upgrade until Mocha itself is being tested in Phantom (see mochajs/mocha#2079).

I'm also interested in seeing if we can swap out mocha-phantomjs-core. I've found the code pretty hard to follow.