Upgrade to emotion v10

Summary: React 16 is not compatible with react-emotion 9 (it prints warnings, see also https://github.com/emotion-js/emotion/issues/644). So we should upgrade to 10.

Reviewed By: mweststrate

Differential Revision: D18905889

fbshipit-source-id: c00d2dbbadb1c08544632cb9bfcd63f2b1818a25

src/chrome/TitleBar.tsx

@@ -43,7 +43,7 @@ import {clipboard} from 'electron';
 import React from 'react';
 import {State} from 'src/reducers';
 
-const AppTitleBar = styled(FlexRow)(({focused}: {focused?: boolean}) => ({
+const AppTitleBar = styled(FlexRow)<{focused?: boolean}>(({focused}) => ({
   background: focused
     ? `linear-gradient(to bottom, ${colors.macOSTitleBarBackgroundTop} 0%, ${colors.macOSTitleBarBackgroundBottom} 100%)`
     : colors.macOSTitleBarBackgroundBlur,