[Snyk] Security upgrade node-sass from 4.13.1 to 9.0.0

[lossless1]

Snyk has created this PR to fix 1 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• client/package.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Allocation of Resources Without Limits or Throttling SNYK-JS-QS-15268416	708

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🦉 Allocation of Resources Without Limits or Throttling