webpack-dev-server/add-types: added type definitions up to webpack-dev-server 3.4.0 (#39093)
webpack-dev-server/add-types: added type definitions up to webpack-dev-server 3.4.0 (#39093)


georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped,dsebastien/DefinitelyTyped,mcliment/DefinitelyTyped