chore(deps): update dependency karma to v5.0.4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
karma (source)	devDependencies	patch	5.0.2 -> 5.0.4

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Release Notes

karma-runner/karma

### [`v5.0.4`](https://togithub.com/karma-runner/karma/blob/master/CHANGELOG.md#​504-httpsgithubcomkarma-runnerkarmacomparev503v504-2020-04-30) [Compare Source](https://togithub.com/karma-runner/karma/compare/v5.0.3...v5.0.4) ##### Bug Fixes - **browser:** make sure that empty results array is still recognized ([#​3486](https://togithub.com/karma-runner/karma/issues/3486)) ([fa95fa3](https://togithub.com/karma-runner/karma/commit/fa95fa3c917470fa4b9ad736287379d1e9ebb350)) ### [`v5.0.3`](https://togithub.com/karma-runner/karma/blob/master/CHANGELOG.md#​503-httpsgithubcomkarma-runnerkarmacomparev502v503-2020-04-29) [Compare Source](https://togithub.com/karma-runner/karma/compare/v5.0.2...v5.0.3) ##### Bug Fixes - **client:** flush resultsBuffer on engine upgrade ([#​3212](https://togithub.com/karma-runner/karma/issues/3212)) ([e44ca94](https://togithub.com/karma-runner/karma/commit/e44ca944fe94ae455cd6dc45d9985a6d9fb94754)), closes [#​3211](https://togithub.com/karma-runner/karma/issues/3211)

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[codecov[bot]]

Codecov Report

Merging #402 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #402   +/-   ##
=======================================
  Coverage   74.19%   74.19%           
=======================================
  Files           5        5           
  Lines          62       62           
  Branches        8        8           
=======================================
  Hits           46       46           
  Misses         12       12           
  Partials        4        4           

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[scttcper]

:tada: This PR is included in version 9.0.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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