Feat: es modules (#139)

* All file imports change from commonjs to es-module

* Improved plex error responses back from api

* Converted viewHistory to es module

* Es-module requires file extension, updated all imports

* Fix esmodule not having __dirname defined in scope

* Replace dynamic-require with fs readFileSync

* Short message service module function is exported as default

* Resolved lint issues & ignore import/extension rule until typescript

* All tests file imports changed from commonjs to es-module

* Import json fixtures with new helper

src/plex/convertPlexToShow.js

@@ -1,4 +1,4 @@
-const Show = require("./types/show");
+import Show from "./types/show.js";
 
 function convertPlexToShow(plexShow) {
   const show = new Show(plexShow.title, plexShow.year);
@@ -10,4 +10,4 @@ function convertPlexToShow(plexShow) {
   return show;
 }
 
-module.exports = convertPlexToShow;
+export default convertPlexToShow;