[A11Y] - FlagButton component does not allow passing props to it

[ruanblimaig]

Hello, I need to pass an aria-label to the flag because I'm using the lib for an application with internationalization. However, the FlagButton component already inserts the aria-label of this component by default. Would it be possible to add this functionality, so that the FlagButton component can receive the aria-label? Or receive all the other props as the other components support.

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mui-tel-input/src/components/FlagButton/FlagButton.tsx

Line 71 in f80136a

aria-label="Select country"

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