Update dependency grunt-contrib-qunit to v4 - abandoned

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
grunt-contrib-qunit	devDependencies	major	~0.2.0 -> ~4.0.0

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

Severity	CVSS Score	CVE	GitHub Issue
High	9.8	CVE-2018-1000620	#161
High	9.8	CVE-2021-23807	#253
High	9.8	CVE-2021-3918	#254
High	9.8	CVE-2021-44906	#298
High	8.8	CVE-2018-3728	#200
High	7.8	CVE-2021-43138	#304
High	7.5	CVE-2015-8855	#92
Medium	6.5	CVE-2020-8244	#89
Medium	5.9	CVE-2017-16026	#98
Medium	5.6	CVE-2020-7598	#135
Medium	5.3	CVE-2017-1000048	#156
Medium	5.3	CVE-2017-15010	#152
Medium	5.3	CVE-2017-16137	#8
Medium	5.1	WS-2018-0075	#112
Medium	5.1	WS-2018-0076	#114
Low	3.7	CVE-2016-1000232	#20

---

• If you want to rebase/retry this PR, click this checkbox. ⚠ Warning: custom changes will be lost.

[mend-for-github-com]

Autoclosing Skipped

This PR has been flagged for autoclosing. However, it is being skipped due to the branch being already modified. Please close/delete it manually or report a bug if you think this is in error.