inputClassName does not work

[jschlachtenhaufen]

Adding the inputClassName property does not add it to the input class list.

I'm confused because I see the code for this in the repo source code, but when I look in the same place in node_modules it's not there

[GeorgeMarcusGG]

The inputClassName prop was added in the v4.0.0-alpha.0 version. I confirmed that it works after installing the 4.0.0-alpha.2 version.