Update mocha to version 2.5.3 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

mocha just published its new version 2.5.3, 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 :palm_tree:

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The new version differs by 6 commits .

• e939d8e Release v2.5.3
• 52dcc3f Rebuild mocha.js
• 7496c14 Update CHANGELOG.md for v2.5.3 [ci skip]
• 9e93efc Make HTML reporter failure/passed links preventDefault to avoid SPA's hash navigation (#2119)
• 6d24063 Fix HTML reporter regression causing duplicate error output (#2112)
• 08cb423 avoid BitBucket rate-limiting when installing PhantomJS

See the full diff.

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[coveralls]

Coverage remained the same at 93.103% when pulling 042cce547817fd4e252d43e68bfc7713fe8eb6ae on greenkeeper-mocha-2.5.3 into c20b01d41dda8e9c4fee50e942fb5bed745a9af7 on master.