- `@types/webpack-env` must be defined as `dependencies` in packages that export a type/function using typings from `@types/webpack-env` (it is often `NodeModule`). In that case `/// <reference types="webpack-env" />` is present in some files of the `dist` folder of the lib. Example: `lib/client-api`.
- `@types/webpack-env` must be defined as `devDependencies` in packages that use its typings internally but does not expose anything related to it. Many addons need the type because they use `module.hot` function. Example: `addons/a11y`
- `webpack-env` should be removed from "compilerOptions.types" key of `tsconfig.json` of packages that don't need it.
I also bump `@types/webpack-env` to ^1.15.0 to have the same version all across the monorepo
