add ipc to open url in default browser

src/main/main.ts

@@ -9,7 +9,7 @@
  * `./src/main.js` using webpack. This gives us some performance wins.
  */
 import path from 'path';
-import { app, BrowserWindow, shell } from 'electron';
+import { app, BrowserWindow, ipcMain, shell } from 'electron';
 import { autoUpdater } from 'electron-updater';
 import log from 'electron-log';
 import { resolveHtmlPath } from './util';
@@ -143,4 +143,8 @@ app
       if (mainWindow === null) createWindow();
     });
   })
-  .catch(console.log);
+  .catch(console.log);
+
+  ipcMain.on('new-window', (event, url: string) => {
+    shell.openExternal(url);
+  });