Search box label does not change color automatically in dark mode

[Abdelgha-4]

Streamlit built-in components change the text color to white when dark mode is selected which is pretty convenient.

Adding the same functionality to streamlit searchbox would be nice !

Thanks

[m-wrzr]

Thanks for the suggestion 👍 there is already some support for light/dark mode but the theme is only updated on the first page load on not when the user changes their preference, I'll fix it in version 0.1.20 (see #82)