fix(prettier): Properly handle lint-stage files (#6970)

Now handles top level files and recursive files in folders.

Set max line length to be 100

spec/EnableSingleSchemaCache.spec.js

@@ -53,6 +53,6 @@ describe('Enable single schema cache', () => {
   });
 });
 
-const fakeRequestForConfig = function() {
+const fakeRequestForConfig = function () {
   return Config.get('test');
 };