Update dependency karma to v6 - abandoned

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This PR contains the following updates:

Package	Type	Update	Change
karma (source)	devDependencies	major	~2.0.0 -> ~6.0.0

By merging this PR, the below issues will be automatically resolved and closed:

Severity	CVSS Score	CVE	GitHub Issue
High	9.8	CVE-2021-44906	#150

By merging this PR, the below issues will be automatically resolved and closed:

Severity	CVSS Score	CVE	GitHub Issue
High	9.8	CVE-2018-16492	#97
High	9.8	CVE-2019-10196	#28
High	9.8	CVE-2020-7769	#72
High	9.8	CVE-2021-23406	#10
High	9.8	CVE-2021-23406	#10
High	9.8	CVE-2021-23518	#129
High	9.8	CVE-2021-42740	#170
High	9.8	CVE-2021-44906	#150
High	9.4	CVE-2021-31597	#91
High	9.1	CVE-2021-28918	#98
High	8.8	CVE-2021-23400	#122
High	8.1	CVE-2020-28502	#47
High	7.8	CVE-2021-43138	#155
High	7.7	CVE-2020-13822	#79
High	7.5	CVE-2018-16472	#9
High	7.5	CVE-2019-10742	#12
High	7.5	CVE-2020-36048	#111
High	7.5	CVE-2020-36049	#114
High	7.5	CVE-2021-29469	#117
High	7.5	CVE-2021-3749	#157
High	7.5	CVE-2022-0654	#144
High	7.5	WS-2020-0091	#109
High	7.2	CVE-2021-23358	#107

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