`CopyBlock` prop 'theme' incompatible with `CodeBlock` prop 'theme'

 I'd have expected the types to be compatible, but they don't overlap sufficiently. It seems like `CodeBlock`'s `theme` prop is `styled-component`'s `DefaultTheme` interface, whereas `CopyBlock`'s is this library's own `Theme` interface. Should they be the same? Otherwise how can I safely pass e.g. the `monoBlue` theme to `CodeBlock`?