[Snyk] Security upgrade mocha from 6.0.2 to 6.2.1

[civilizador]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json
  • package-lock.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	696/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 7.5	Regular Expression Denial of Service (ReDoS) SNYK-JS-ANSIREGEX-1583908	No	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: mocha

The new version differs by 91 commits.

• ef6c820 Release v6.2.1
• 9524978 updated CHANGELOG for v6.2.1 [ci skip]
• dfdb8b3 Update yargs to v13.3.0 (#3986)
• 18ad1c1 treat '--require esm' as Node option (#3983)
• fcffd5a Update yargs-unparser to v1.6.0 (#3984)
• ad4860e Remove extraGlobals() (#3970)
• b269ad0 Clarify effect of .skip() (#3947)
• 1e6cf3b Add Matomo to website (#3765)
• 91b3a54 fix style on mochajs.org (#3886)
• 0e9d8ad tty.getWindowSize is not a function inside a "worker_threads" worker (#3955)
• 48da42e Remove jsdoc index.html placeholder from eleventy file structure and fix broken link in jsdoc tutorial (#3966)
• bd47776 Release v6.2.0
• cc595af update CHANGELOG.md for v6.2.0 [ci skip]
• 59d70ee fix: remove duplicate line-height property (#3957)
• f77cac4 fix: do not redeclare variable (#3956)
• 6201e42 Hide stacktrace when cli args are missing (#3963)
• 88f45d5 Don't re-initialize grep option on watch re-run (#3960)
• 5d4dd98 Fix No Files error when file is passed via --files (#3942)
• 15b96af Collect test files later (#3953)
• ccee5f1 Base reporter store ref to console.log (#3725)
• 47318a7 update @ mocha/contributors to v1.0.4 (#3944)
• c903147 More, improved integration tests for watching (#3929)
• e341ea4 Update CI config files to use Node-12.x (#3919)
• 3064d25 update @ mocha/docdash to v2.1.1 (#3945)

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