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/utils/pluginStateRecorder.tsx

@@ -46,7 +46,7 @@ async function flipperStartPluginRecording(state: State) {
     throw new Error('A plugin recording is already running');
   }
   const app = state.connections.selectedApp;
-  const client = state.connections.clients.find(client => client.id === app);
+  const client = state.connections.clients.find((client) => client.id === app);
   if (!app || !client) {
     throw new Error('Can only record plugin states if a device is selected');
   }