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/app/src/init.tsx

@@ -46,7 +46,7 @@ const AppFrame = () => {
   const [warnEmployee, setWarnEmployee] = useState(false);
   useEffect(() => {
     if (fbConfig.warnFBEmployees) {
-      isFBEmployee().then(isEmployee => {
+      isFBEmployee().then((isEmployee) => {
         setWarnEmployee(isEmployee);
       });
     }
@@ -85,7 +85,7 @@ function setProcessState(store: Store) {
   // it exists
   process.env.PATH =
     ['emulator', 'tools', 'platform-tools']
-      .map(directory => path.resolve(androidHome, directory))
+      .map((directory) => path.resolve(androidHome, directory))
       .join(':') + `:${process.env.PATH}`;
 
   window.requestIdleCallback(() => {