[Snyk] Security upgrade webpack-dev-server from 4.15.2 to 5.2.1

[snyk-io]

Snyk has created this PR to fix 3 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• examples/with-vanilla-js/package.json

Vulnerabilities that will be fixed with an upgrade:

	Issue
	Missing Release of Resource after Effective Lifetime SNYK-JS-INFLIGHT-6095116
	Origin Validation Error SNYK-JS-WEBPACKDEVSERVER-10300775
	Exposed Dangerous Method or Function SNYK-JS-WEBPACKDEVSERVER-10300777

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[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scanner	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues

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