[Snyk] Security upgrade webpack-dev-server from 3.10.3 to 5.2.1

[samid737]

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Snyk has created this PR to fix 2 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• package.json
• package-lock.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Origin Validation Error SNYK-JS-WEBPACKDEVSERVER-10300775	748
	Exposed Dangerous Method or Function SNYK-JS-WEBPACKDEVSERVER-10300777	693

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