Relax validation of record props defined along the react component.

[melanore]

Relax validation of record props defined within the same file as the react component.

Original issue within Feliz repo - #463
Reason for validation - pmmmwh/react-refresh-webpack-plugin#258

Can we relax the validation to allow lowercased record types?

type example = { value: string }
[<ReactComponent>]
let Example (props: example) = Html.div [ ]

Lowercased type will not break react-refresh and will allow the alternative to use of anonymous records - the latter are handy in a single client project scenario, but can not be used in a cross project scenario: anonymous record props and react component defined in project A and is called from project B.