Add electron support

Hello! I'm playing around with shadow-cljs + electron (which seems to work really nice!). dirac seems like it would benefit me greatly, so I tried adding it using electrons `BrowserWindow.addDevToolsExtension(path)` (api docs [here](https://electronjs.org/docs/api/browser-window#browserwindowadddevtoolsextensionpath)).
Sadly I get this error, and I'm unable to figure out what's going wrong:
```
Uncaught Exception:
TypeError [ERR_INVALID_ARG_TYPE] [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined
at validateString (internal/validators.js:105:11)
at Object.join (path.js:1037:7)
at startBackgroundPages (/Users//examples/electron/node_modules/electron/dist/Electron.app/Contents/Resources/electron.asar/browser/chrome-extension.js:80:33)
at loadExtension (/Users//examples/electron/node_modules/electron/dist/Electron.app/Contents/Resources/electron.asar/browser/chrome-extension.js:288:3)
at Function.BrowserWindow.addExtension (/Users//examples/electron/node_modules/electron/dist/Electron.app/Contents/Resources/electron.asar/browser/chrome-extension.js:378:7)
at Function.BrowserWindow.addDevToolsExtension (/Users//examples/electron/node_modules/electron/dist/Electron.app/Contents/Resources/electron.asar/browser/chrome-extension.js:408:40)
at Object.example$main$create_window [as create_window] (/Users//examples/electron/.shadow-cljs/builds/main/dev/out/cljs-runtime/example.main.js:30:46)
at App.example$main$maybe_create_window (/Users//examples/electron/.shadow-cljs/builds/main/dev/out/cljs-runtime/example/main.cljs:51:3)
at App.emit (events.js:194:13)
```

I've successfully used the react dev tools extension, so I don't think I'm doing anything wrong on my end.

Any help or suggestions is very appreciated. :)