Release latest version

I just tried to use this, but can't since it doesn't support flexbox. Looks like it's supported in the last dependency on `valid-css-props`, so could we get a patch released? What's the purpose of disallowing styles anyway - wouldn't warning just be enough?

Start by checking how the project declares its valid-css-props dependency and reviewing the release process. Verify whether the dependency version includes flexbox support, then determine whether the requested patch release also requires a decision about disallowing styles versus warning. Done means the supported behavior is confirmed and an updated release is prepared.

Written by the indexing model from the issue text.