chore(deps): update dependency @types/mocha to v5.2.6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
@​types/mocha	devDependencies	patch	5.2.5 -> 5.2.6	source

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[felixfbecker]

:tada: This PR is included in version 2.3.11 :tada:

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