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

tests/helpers/importFixture.js

@@ -0,0 +1,23 @@
+import fs from "fs";
+import path from "path";
+import { fileURLToPath } from "url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+function determineLocation(fixtureFilename) {
+  return path.join(__dirname, "..", "fixtures", fixtureFilename);
+}
+
+export default function readFixtureContents(fixtureFilename) {
+  const location = determineLocation(fixtureFilename);
+
+  let content = {};
+  try {
+    content = JSON.parse(fs.readFileSync(location, { encoding: "utf-8" }));
+  } catch (err) {
+    console.error(`Error loading fixture file at path: ${location}`);
+  }
+
+  return content;
+}