[Snyk] Upgrade mocha from 6.2.1 to 6.2.2

[snyk-bot]

Snyk has created this PR to upgrade mocha from 6.2.1 to 6.2.2.

• The recommended version is 1 version ahead of your current version.
• The recommended version was released 8 days ago, on 2019-10-18.

Release notes

• Package name: mocha
  • 6.2.2 - 2019-10-18

    6.2.2 / 2019-10-18

    🐛 Fixes

    • #4025: Fix duplicate EVENT_RUN_END events upon uncaught exception (@juergba)
    • #4051: Fix "unhide" function in html reporter (browser) (@pec9399)
    • #4063: Fix use of esm in Node.js v8.x (@boneskull)
    • #4033: Fix output when multiple async exceptions are thrown (@juergba)

    📖 Documentation

    • #4046: Site accessibility fixes (@Mia-jeong)
    • #4026: Update docs for custom reporters in browser (@Lindsay-Needs-Sleep)
    • #3971: Adopt new OpenJS Foundation Code of Conduct (@craigtaub)
  • 6.2.1 - 2019-09-29

    6.2.1 / 2019-09-29

    🐛 Fixes

    • #3955: tty.getWindowSize is not a function inside a "worker_threads" worker (@1999)
    • #3970: remove extraGlobals() (@juergba)
    • #3984: Update yargs-unparser to v1.6.0 (@juergba)
    • #3983: Package 'esm': spawn child-process for correct loading (@juergba)
    • #3986: Update yargs to v13.3.0 and yargs-parser to v13.1.1 (@juergba)

    📖 Documentation

    • #3886: fix styles on mochajs.org (@outsideris)
    • #3966: Remove jsdoc index.html placeholder from eleventy file structure and fix broken link in jsdoc tutorial (@Munter)
    • #3765: Add Matomo to website (@MarioDiaz98)
    • #3947: Clarify effect of .skip() (@oliversalzburg)
from [`mocha` GitHub Release Notes](https://github.com/mochajs/mocha/releases)

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