Header maps to (semantically incorrect) h1 tag with react-native-web

Hi (again)
Currently, with react-native-web, the Header component root container maps to a h1 tag (which is highly incorrect in semantics for this element).

react-native-ui-datepicker/src/components/Header.tsx

Line 166 in bd0cea9

accessibilityRole="header"

I think this is due to accessibilityRole="header" but I am not sure about that.

https://necolas.github.io/react-native-web/docs/accessibility/

Thanks!