Bump mocha from 6.1.4 to 6.2.0

Bumps [mocha](https://github.com/mochajs/mocha) from 6.1.4 to 6.2.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v6.1.4...v6.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

yarn.lock

@@ -3680,8 +3680,8 @@ mkdirp@0.5.1, mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.1:
     minimist "0.0.8"
 
 mocha@^6.1.3:
-  version "6.1.4"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-6.1.4.tgz#e35fada242d5434a7e163d555c705f6875951640"
+  version "6.2.0"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-6.2.0.tgz#f896b642843445d1bb8bca60eabd9206b8916e56"
   dependencies:
     ansi-colors "3.2.3"
     browser-stdout "1.3.1"