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/scripts/build-release.ts

@@ -116,7 +116,7 @@ async function buildDist(buildFolder: string) {
       projectDir: buildFolder,
       targets,
     });
-    return await Promise.all(postBuildCallbacks.map(p => p()));
+    return await Promise.all(postBuildCallbacks.map((p) => p()));
   } catch (err) {
     return die(err);
   }
@@ -138,8 +138,8 @@ function downloadIcons(buildFolder: string) {
   >((acc, [name, sizes]) => {
     acc.push(
       // get icons in @1x and @2x
-      ...sizes.map(size => ({name, size, density: 1})),
-      ...sizes.map(size => ({name, size, density: 2})),
+      ...sizes.map((size) => ({name, size, density: 1})),
+      ...sizes.map((size) => ({name, size, density: 2})),
     );
     return acc;
   }, []);
@@ -148,7 +148,7 @@ function downloadIcons(buildFolder: string) {
     iconURLs.map(({name, size, density}) => {
       const url = getIconURL(name, size, density);
       return fetch(url)
-        .then(res => {
+        .then((res) => {
           if (res.status !== 200) {
             throw new Error(
               // eslint-disable-next-line prettier/prettier
@@ -160,7 +160,7 @@ function downloadIcons(buildFolder: string) {
           return res;
         })
         .then(
-          res =>
+          (res) =>
             new Promise((resolve, reject) => {
               const fileStream = fs.createWriteStream(
                 path.join(buildFolder, buildLocalIconPath(name, size, density)),