Update dependency mocha to v7.1.2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
mocha (source)	devDependencies	patch	7.1.1 -> 7.1.2

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Release Notes

mochajs/mocha

### [`v7.1.2`](https://togithub.com/mochajs/mocha/blob/master/CHANGELOG.md#​712--2020-04-26) [Compare Source](https://togithub.com/mochajs/mocha/compare/v7.1.1...v7.1.2) #### :nut_and_bolt: Other - [#​4251](https://togithub.com/mochajs/mocha/issues/4251): Prevent karma-mocha from stalling ([**@​juergba**](https://togithub.com/juergba)) - [#​4222](https://togithub.com/mochajs/mocha/issues/4222): Update dependency mkdirp to v0.5.5 ([**@​outsideris**](https://togithub.com/outsideris)) #### :book: Documentation - [#​4208](https://togithub.com/mochajs/mocha/issues/4208): Add Wallaby logo to site ([**@​boneskull**](https://togithub.com/boneskull))

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