Adding height as a parameter to export_chart()

[gcgruen]

🚀 Feature Request

Would be great to be able to not only pass width but additionally also height as a parameter to the export_chart() function.

🔈 Motivation

This would allow for easier script-production of customized formats for exports.

🛰 Alternatives

For now, we're using the export function within Datawrapper - just means more clicking.

📎 Additional context

Generally props for the library, it makes my life so much easier. Thank you for inventing and maintaining it!