only notarize mac builds (#239)

Author: gwleuverink

resources/js/build/notarize.js

@@ -1,7 +1,11 @@
 import { notarize } from '@electron/notarize';
 
 export default async (context) => {
-    if (process.platform !== 'darwin') return
+    // Only notarize when process is running on a Mac
+    if (process.platform !== 'darwin') return;
+
+    // And the current build target is macOS
+    if (context.packager.platform.name !== 'mac') return;
 
     console.log('aftersign hook triggered, start to notarize app.')