Bump @cypress/webpack-dev-server from 3.4.1 to 4.0.0 (#16547)

Bumps [@cypress/webpack-dev-server](https://github.com/cypress-io/cypress) from 3.4.1 to 4.0.0.
- [Release notes](https://github.com/cypress-io/cypress/releases)
- [Changelog](https://github.com/cypress-io/cypress/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/cypress-io/cypress/compare/@cypress/webpack-dev-server-v3.4.1...@cypress/webpack-dev-server-v4.0.0)

---
updated-dependencies:
- dependency-name: "@cypress/webpack-dev-server"
  dependency-version: 4.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -148,7 +148,7 @@
     "@cypress/code-coverage": "3.10.4",
     "@cypress/grep": "4.1.1",
     "@cypress/vue": "5.0.5",
-    "@cypress/webpack-dev-server": "3.4.1",
+    "@cypress/webpack-dev-server": "4.0.0",
     "@percy/cli": "1.31.8",
     "@percy/cypress": "3.1.6",
     "@types/copy-webpack-plugin": "5.0.3",