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

src/deprecated.js

@@ -1,5 +1,5 @@
 export function useExternal(name, moduleName) {
-  return function() {
+  return function () {
     throw `${name} is not provided by parse-server anymore; please install ${moduleName}`;
   };
 }