Update dependency karma-mocha to v2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
karma-mocha	^1.1.1 -> ^2.0.0

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Release Notes

karma-runner/karma-mocha (karma-mocha)

v2.0.1

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Bug Fixes

• deps: Report fails without emit 'test end' event (#​223) (1a8226c)

v2.0.0

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Features

• ci: enable semanitic-release (5a5b6d5)

• Expose 'pending' status (e847121), closes #​109

• Update Node.js versions (fd64f5b)

BREAKING CHANGES

• drop support for node 8

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