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/searchHistory/searchHistory.js

@@ -1,4 +1,4 @@
-const establishedDatabase = require("../database/database");
+import establishedDatabase from "../database/database.js";
 
 class SearchHistoryCreateDatabaseError extends Error {
   constructor(message = "an unexpected error occured", errorResponse = null) {
@@ -55,4 +55,4 @@ class SearchHistory {
   }
 }
 
-module.exports = SearchHistory;
+export default SearchHistory;