JsBarcode with secure style-src directive

[phil9001]

I am working on a project where we use this great package. However - we are optimizing our CSP headers and thus making them more strict. We ran into an issue with this package due to the way styles are applied. It appears the styles are applied in the renderes, which is the reason I am making this issue and not a PR, as written in the CONTRIBUTING.md file.

This Stack Overflow question describes the problem a bit more and also comes with the potential solution.