Statuses.js error

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Hello,
I'm encountering the issue below


**My background.js is as follows**


I have checked #297 and tried the fix but it hasn't worked for me

I am using this tutorial -> https://medium.com/@nyorikakar/printing-with-vue-electron-and-node-f52a730e63e7

### Environment

- yarn 1.22.4
- escpos 3.0.0-alpha.6
- escpos-usb 3.0.0-alpha.4

### Steps to reproduce:

1. Install electron builder `vue add electron-builder`
2. Install escpos `yarn add escpos`
3. Add escpos to background.js
4. Run `yarn electron:serve`

### **Full Error Stack**

`⠹ Bundling main process...`
` ERROR Failed to compile with 1 errors 9:02:13 AM`
`error in ./node_modules/escpos/statuses.js`
`Module parse failed: Unexpected token (7:7)`
`You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders`
`|`
`| class DeviceStatus {`
`> byte = '';`
`| bits = [];`
`| bitsAsc = [];`

`@ ./node_modules/escpos/index.js 12:17-38`
`@ ./src/background.js`
`@ multi ./src/background.js`

`ERROR Build failed with errors.`
`error Command failed with exit code 1.`
`info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.`

Start with src/background.js and the failing dependency node_modules/escpos/statuses.js, then reproduce the error with yarn electron:serve. Check how the Electron builder handles the class fields shown in statuses.js and compare the result with issue #297. Done means the main process bundles without the parse error while escpos remains usable.

Written by the indexing model from the issue text.