Update dependency mocha to v7.1.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
mocha (source)	devDependencies	patch	7.1.0 -> 7.1.1

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Release Notes

mochajs/mocha

### [`v7.1.1`](https://togithub.com/mochajs/mocha/blob/master/CHANGELOG.md#​711--2020-03-18) [Compare Source](https://togithub.com/mochajs/mocha/compare/v7.1.0...v7.1.1) #### :lock: Security Fixes - [#​4204](https://togithub.com/mochajs/mocha/issues/4204): Update dependencies mkdirp, yargs-parser and yargs ([**@​juergba**](https://togithub.com/juergba)) #### :bug: Fixes - [#​3660](https://togithub.com/mochajs/mocha/issues/3660): Fix `runner` listening to `start` and `end` events ([**@​juergba**](https://togithub.com/juergba)) #### :book: Documentation - [#​4190](https://togithub.com/mochajs/mocha/issues/4190): Show Netlify badge on footer ([**@​outsideris**](https://togithub.com/outsideris))

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