`setupIcon` config failed when `productName` contains chinese character ;`Fatal error: Unable to load file`

## Reproduce Steps
Clone this repo `https://github.com/rosendolu/electron-app-debug`

```sh
git clone https://github.com/rosendolu/electron-app-debug
npm i
npm run make
```
```js
// forge.config.js
...,
{
name: '@electron-forge/maker-squirrel',
config: {
// The ICO file to use as the icon for the generated Setup.exe
setupIcon: path.resolve(__dirname, './icon/app.ico'),
},
},
```
```json
// package.json
...,
"name": "electron-app",
"productName":"electron中文",
```

You will got this error


But if you remove the chinese characters of `productName` in `package.json`
```json
// package.json
...,
"name": "electron-app",
"productName":"electron",
```
Or just remove the custom setupIcon conf
```js
// forge.config.js
...,
{
name: '@electron-forge/maker-squirrel',
config: {
// The ICO file to use as the icon for the generated Setup.exe
// setupIcon: path.resolve(__dirname, './icon/app.ico'),
},
},
```
Every works well !

As above pic shows , `spawn` process exit with `code 1`,but I can`t figure out how to solve it ,any advice would be grateful.