Deprecation of @types/classnames

[irenako]

Hello! I’m encountering a deprecation warning related to the @types/classnames package in react-widgets@5.8.6 According the classnames package, it provides its own type definitions, so there is no longer a need for the @types/classnames dependency. However, react-widgets still lists this as a dependency, causing the following warning:
npm WARN deprecated @types/classnames@2.3.4: This is a stub types definition. classnames provides its own type definitions, so you do not need this installed.

Steps to reproduce:

1. Install the latest version of react/widgets.
2. Remove node_modules and package-lock.json
3. Install dependencies

[dmccoystephenson]

I am also encountering this issue.