RadioGroup doesn't support name prop

[richardscarrott]

RadioGroup generates a random name prop, making it unusual for JS handling and unusable for HTML form submissions.

i.e. A native form action (server side) has no way of knowing what the name will be.

https://codesandbox.io/s/empty-https-ej6nsc

[brandongregoryscott]

Seems like an oversight, but should be simple enough to fix!

[brandongregoryscott]

This should be resolved in https://github.com/segmentio/evergreen/releases/tag/v6.10.4