Update dependency webpack-dev-server to v4.1.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
webpack-dev-server	4.1.0 -> 4.1.1

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Release Notes

webpack/webpack-dev-server

### [`v4.1.1`](https://togithub.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md#​411-httpsgithubcomwebpackwebpack-dev-servercomparev410v411-2021-09-07) [Compare Source](https://togithub.com/webpack/webpack-dev-server/compare/v4.1.0...v4.1.1)

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Configuration

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[elliotcourant]

bors r+

[bors[bot]]

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