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/doctor/src/index.ts

@@ -236,7 +236,7 @@ export async function runHealthchecks(): Promise<
                 key,
                 label,
                 isRequired: isRequired ?? true,
-                result: await run(environmentInfo).catch(e => {
+                result: await run(environmentInfo).catch((e) => {
                   console.error(e);
                   // TODO Improve result type to be: OK | Problem(message, fix...)
                   return {
@@ -273,7 +273,7 @@ async function tryExecuteCommand(
 
 async function isWatchmanAvailable(): Promise<boolean> {
   const client = new watchman.Client();
-  return new Promise(resolve => {
+  return new Promise((resolve) => {
     const complete = (result: boolean) => {
       resolve(result);
       client.removeAllListeners('error');
@@ -282,7 +282,7 @@ async function isWatchmanAvailable(): Promise<boolean> {
     client.once('error', () => complete(false));
     client.capabilityCheck(
       {optional: [], required: ['relative_root']},
-      error => {
+      (error) => {
         if (error) {
           complete(false);
           return;