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/MockPushAdapter.js

@@ -1,8 +1,8 @@
-module.exports = function(options) {
+module.exports = function (options) {
   return {
     options: options,
-    send: function() {},
-    getValidPushTypes: function() {
+    send: function () {},
+    getValidPushTypes: function () {
       return Object.keys(options.options);
     },
   };