* feat: migrate to new webpack-dev-server public api
* fix: extract version check, and disallow minor releases matching `/3\./` with a starts with req.
* feat: support webpack-dev-server v4
* fix webpack warning causing overlay and types
* pin test dependency
* fix tests that were using incorrect wewbpack configuration
Co-authored-by: Ollie Relph <ollie@relph.me>