chore(deps): update dependency mocha to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
mocha	devDependencies	major	^5.2.0 -> ^6.0.0	homepage, source

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Release Notes

mochajs/mocha

v6.0.0

Compare Source

🎉 Enhancements

• #​3726: Add ability to unload files from require cache (@​plroebuck)

🐛 Fixes

• #​3737: Fix falsy values from options globals (@​plroebuck)
• #​3707: Fix encapsulation issues for Suite#_onlyTests and Suite#_onlySuites (@​vkarpov15)
• #​3711: Fix diagnostic messages dealing with plurality and markup of output (@​plroebuck)
• #​3723: Fix "reporter-option" to allow comma-separated options (@​boneskull)
• #​3722: Fix code quality and performance of lookupFiles and files (@​plroebuck)
• #​3650, #​3654: Fix noisy error message when no files found (@​craigtaub)
• #​3632: Tests having an empty title are no longer confused with the "root" suite (@​juergba)
• #​3666: Fix missing error codes (@​vkarpov15)
• #​3684: Fix exiting problem in Node.js v11.7.0+ (@​addaleax)
• #​3691: Fix --delay (and other boolean options) not working in all cases (@​boneskull)
• #​3692: Fix invalid command-line argument usage not causing actual errors (@​boneskull)
• #​3698, #​3699: Fix debug-related Node.js options not working in all cases (@​boneskull)
• #​3700: Growl notifications now show the correct number of tests run (@​outsideris)
• #​3686: Avoid potential ReDoS when diffing large objects (@​cyjake)
• #​3715: Fix incorrect order of emitted events when used programmatically (@​boneskull)
• #​3706: Fix regression wherein --reporter-option/--reporter-options did not support comma-separated key/value pairs (@​boneskull)

📖 Documentation

• #​3652: Switch from Jekyll to Eleventy (@​Munter)

🔩 Other

• #​3677: Add error objects for createUnsupportedError and createInvalidExceptionError (@​boneskull)
• #​3733: Removed unnecessary processing in post-processing hook (@​wanseob)
• #​3730: Update nyc to latest version (@​coreyfarrell)
• #​3648, #​3680: Fixes to support latest versions of unexpected and unexpected-sinon (@​sunesimonsen)
• #​3638: Add meta tag to site (@​MartijnCuppens)
• #​3653: Fix parts of test suite failing to run on Windows (@​boneskull)

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