Refactor to remove "Async" function name suffix

Remove convention where Async suffix is added to functions that returns
a Promise. It was a habit from C#, but is not widely used in JavaScript
/ TypeScript world, also bloats the code. The code is more consistent
with third party dependencies/frameworks without the suffix.

src/presentation/electron/main.ts

@@ -124,7 +124,7 @@ function loadApplication(window: BrowserWindow) {
     // Load the index.html when not in development
     loadUrlWithNodeWorkaround(win, 'app://./index.html');
     const updater = setupAutoUpdater();
-    updater.checkForUpdatesAsync();
+    updater.checkForUpdates();
   }
 }