chore: add ts-check to js files (#1285)

Author: afonsojramos

src/__mocks__/electron.js

@@ -1,3 +1,4 @@
+// @ts-ignore
 window.Notification = function (title) {
   this.title = title;
 
@@ -6,6 +7,7 @@ window.Notification = function (title) {
   };
 };
 
+// @ts-ignore
 window.Audio = class Audio {
   constructor(path) {
     this.path = path;
@@ -14,6 +16,7 @@ window.Audio = class Audio {
   play() {}
 };
 
+// @ts-ignore
 window.localStorage = {
   store: {},
   getItem: function (key) {

tsconfig.json

@@ -12,7 +12,8 @@
     "allowSyntheticDefaultImports": true,
     "esModuleInterop": true,
     "types": ["jest"],
-    "skipLibCheck": true
+    "skipLibCheck": true,
+    "checkJs": true
   },
   "include": [
     "src/**/*.js",