chore(deps): update dependency grunt-mocha-cli to v7

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
grunt-mocha-cli	^4.0.0 -> ^7.0.0

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Release Notes

Rowno/grunt-mocha-cli (grunt-mocha-cli)

v7.0.0: 7.0.0

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Breaking changes

Upgraded to Mocha 8, see the Mocha changelog for all the breaking changes.

v6.0.0: 6.0.0

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Enhancements

• Upgraded to Mocha 7.

Breaking changes

• Dropped Node 8 support.
• Removed the debug-brk, debug and ndebug options.
• See the Mocha 7 release notes for all the other breaking changes.

v5.0.0: 5.0.0

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Breaking changes

• Drop Node 4 and Node 6 support.
• Upgrade to Mocha 6.

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