Consider supporting custom `skip_class` ?

[luolingchun]

I want to skip custom img tag.

https://github.com/blueswen/mkdocs-glightbox/blob/main/mkdocs_glightbox/plugin.py#L71-L73

[blueswen]

@luolingchun Thanks for the advice. The new plugin option skip_classes in v0.3.0 may meet your requirements, you can check the demo on https://blueswen.github.io/mkdocs-glightbox/disable/image/.