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/icons.ts

@@ -90,7 +90,7 @@ export function buildIconURL(name: string, size: number, density: number) {
       if (!existing.includes(size)) {
         // Check if that icon actually exists!
         fetch(url)
-          .then(res => {
+          .then((res) => {
             if (res.status === 200 && !existing.includes(size)) {
               // the icon exists
               existing.push(size);
@@ -112,7 +112,7 @@ export function buildIconURL(name: string, size: number, density: number) {
               );
             }
           })
-          .catch(e => console.error(e));
+          .catch((e) => console.error(e));
       }
     } else {
       console.warn(
@@ -132,7 +132,7 @@ export function getIconURL(name: string, size: number, density: number) {
   let requestedSize = size;
   if (!AVAILABLE_SIZES.includes(size)) {
     // find the next largest size
-    const possibleSize = AVAILABLE_SIZES.find(size => {
+    const possibleSize = AVAILABLE_SIZES.find((size) => {
       return size > requestedSize;
     });
 
@@ -146,7 +146,7 @@ export function getIconURL(name: string, size: number, density: number) {
 
   if (!DENSITIES.includes(density)) {
     // find the next largest size
-    const possibleDensity = DENSITIES.find(scale => {
+    const possibleDensity = DENSITIES.find((scale) => {
       return scale > density;
     });