Update dependency gulp-sass to v5 - autoclosed

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
gulp-sass	devDependencies	major	4.0.2 -> 5.0.0

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

Severity	CVSS Score	CVE	GitHub Issue
Medium	5.3	CVE-2021-23362	#108

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

Severity	CVSS Score	CVE	GitHub Issue
High	9.8	CVE-2021-3918	#148
High	9.8	CVE-2018-11499	#73
High	9.1	CVE-2019-10744	#9
High	8.8	CVE-2018-11694	#17
High	8.8	CVE-2018-11696	#20
High	8.8	CVE-2018-19827	#85
High	8.1	CVE-2018-11698	#15
High	8.1	CVE-2018-11697	#21
High	8.1	CVE-2021-32804	#125
High	7.5	CVE-2018-20834	#34
High	7.5	CVE-2021-33623	#37
High	7.5	CVE-2021-3807	#146
High	7.5	CVE-2019-13173	#60
High	7.3	WS-2019-0180	#50
Medium	6.5	CVE-2018-19839	#38
Medium	6.5	CVE-2018-19838	#39
Medium	6.5	CVE-2018-19837	#40
Medium	6.5	CVE-2018-19797	#43
Medium	6.5	CVE-2019-6284	#44
Medium	6.5	CVE-2019-6286	#47
Medium	6.5	CVE-2018-20822	#49
Medium	6.5	CVE-2018-20821	#52
Medium	6.5	CVE-2019-6283	#53
Medium	6.5	CVE-2019-18797	#77
Medium	6.5	CVE-2018-20190	#106
Medium	5.6	CVE-2020-15366	#105
Medium	5.3	CVE-2020-24025	#30

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Release Notes

dlmanning/gulp-sass

v5.0.0

Compare Source

June 25, 2021

https://github.com/dlmanning/gulp-sass/releases/tag/v5.0.0

v4.1.1

Compare Source

June 24, 2021

https://github.com/dlmanning/gulp-sass/releases/tag/v4.1.1

v4.1.0

Compare Source

April 23, 2020

https://github.com/dlmanning/gulp-sass/releases/tag/v4.1.0

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