Update dependency eslint-plugin-mocha to v6.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
eslint-plugin-mocha	devDependencies	patch	6.2.0 -> 6.2.1

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Release Notes

lo1tuma/eslint-plugin-mocha

### [`v6.2.1`](https://togithub.com/lo1tuma/eslint-plugin-mocha/blob/master/CHANGELOG.md#​621-October-28-2019) [Compare Source](https://togithub.com/lo1tuma/eslint-plugin-mocha/compare/6.2.0...6.2.1) ##### Bug Fixes - Fix no-setup-in-describe to allow mocha config calls ([#​215](https://togithub.com/lo1tuma/eslint-plugin-mocha/pull/215)) - Relax no-synchronous-tests to allow non literals from concise arrows ([#​216](https://togithub.com/lo1tuma/eslint-plugin-mocha/pull/216)) ##### Documentation - Minor documentation tweaks ([#​217](https://togithub.com/lo1tuma/eslint-plugin-mocha/pull/217)) ##### Dependency Upgrades - Update devDependencies ([#​218](https://togithub.com/lo1tuma/eslint-plugin-mocha/pull/218))

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