Option to exclude directories

[blackfalcon]

With the current configuration options, you can only include directories to validate via the CLI. While I see the point of that, there will always be use cases where there needs to be a folder of things that break the normal rules.

Having an -e option to ignore a directory would be an awesome feature!

Thanks

[vyacheslavzhabitsky]

faced with the same issue

[birjj]

I'd be happy to look at a PR implementing this. I am unfortunately unable to dedicate any real time to svglint for the foreseeable future.