prettier 2

Summary:
Quick notes:

- This looks worse than it is. It adds mandatory parentheses to single argument lambdas. Lots of outrage on Twitter about it, personally I'm {emoji:1f937_200d_2642} about it.
- Space before function, e.g. `a = function ()` is now enforced. I like this because both were fine before.
- I added `eslint-config-prettier` to the config because otherwise a ton of rules conflict with eslint itself.

Close https://github.com/facebook/flipper/pull/915

Reviewed By: jknoxville

Differential Revision: D20594929

fbshipit-source-id: ca1c65376b90e009550dd6d1f4e0831d32cbff03

desktop/plugins/navigation/components/IconButton.tsx

@@ -49,7 +49,7 @@ const IconButton = styled.div({
   },
 });
 
-export default function(props: Props) {
+export default function (props: Props) {
   return (
     <RippleEffect>
       <IconButton className="icon-button" onClick={props.onClick}>

desktop/plugins/navigation/components/Timeline.tsx

@@ -76,7 +76,7 @@ export default (props: Props) => {
                 }
                 className={event.className}
                 uri={event.uri}
-                onNavigate={uri => {
+                onNavigate={(uri) => {
                   if (timelineRef.current != null) {
                     timelineRef.current.scrollTo(0, 0);
                   }