Barcode Size Consistency

[MarleTangible]

First of all, great project, thank you.

I was experimenting with the API and realized that there's an issue with the image sizes or caching somewhere.

Most 5 digit numbers are 234x130

https://barcodeapi.org/api/128/12345

However, 25000 has a different dimension, 234x168.

I thought adding the default height parameter would fix the issue, but the API returns varying sizes of images when the bar height is defined.

https://barcodeapi.org/api/128/25000

https://barcodeapi.org/api/128/25000?height=22