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/plugins/navigation/index.tsx

@@ -106,7 +106,7 @@ export default class extends FlipperPlugin<State, any, PersistedState> {
     const {selectedApp} = this.props;
     this.subscribeToNavigationEvents();
     this.getDevice()
-      .then(device => getAppMatchPatterns(selectedApp, device))
+      .then((device) => getAppMatchPatterns(selectedApp, device))
       .then((patterns: Array<AppMatchPattern>) => {
         this.props.setPersistedState({
           appMatchPatterns: patterns,
@@ -118,7 +118,7 @@ export default class extends FlipperPlugin<State, any, PersistedState> {
       .catch(() => {
         /* Silently fail here. */
       });
-    readBookmarksFromDB().then(bookmarks => {
+    readBookmarksFromDB().then((bookmarks) => {
       this.props.setPersistedState({
         bookmarks: bookmarks,
         bookmarksProvider: bookmarksToAutoCompleteProvider(bookmarks),