Declare prettier the winner

Summary:
There's been an ongoing fight between eslint and prettier.
You win, prettier.

Reviewed By: danielbuechele

Differential Revision: D14799153

fbshipit-source-id: a4f0546a3a468bb21fed47d61bc14bd7e6f0b185

.eslintrc.js

@@ -38,5 +38,6 @@ module.exports = {
         parser: 'flow',
       },
     ],
+    'flowtype/object-type-delimiter': [0],
   },
 };