Merge pull request #544 from brave/theme_changes

allow any kind of theme for themeProvider and helper methods

src/theme/index.tsx

@@ -1,7 +1,7 @@
 // @ts-ignore: Needed for ThemeProvider
 import * as React from 'react'
 import * as styledComponents from 'styled-components'
-import IThemeProps, { BraveThemedStyledProps as ThemedStyledProps } from './theme-interface'
+import { BraveThemedStyledProps as ThemedStyledProps } from './theme-interface'
 // theme for testing
 import TestTheme from './brave-default'
 
@@ -17,7 +17,7 @@ const {
   //   see: https://github.com/palantir/tslint/issues/3505
   //   It's possibly due to the rule upstream in tslint-config-standard
   // tslint:disable-next-line
-} = styledComponents as styledComponents.ThemedStyledComponentsModule<IThemeProps>
+} = styledComponents as styledComponents.ThemedStyledComponentsModule<any>
 
 export default styled