chore(deps): update dependency webpack-dev-server to v4

This MR contains the following updates:

Package	Type	Update	Change
webpack-dev-server	devDependencies	major	3.11.2 -> 4.0.0
@types/webpack-dev-server	devDependencies	major	3.11.6 -> 4.0.3

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Release Notes

webpack/webpack-dev-server

v4.0.0

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