♻️ update @types/karma to v4 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@types/karma	devDependencies	major	^3.0.2 -> ^4.0.0

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[codecov[bot]]

Codecov Report

Merging #274 into master will not change coverage by %. The diff coverage is n/a.