Feature request - multiple files

[marcobiedermann]

I would be great if you could use some file blobbing e.g. **/*.{yaml,yml} instead of passing just a single file as input.

[PatMyron]

cfn-python-lint added support for linting multiple templates here if that helps

https://github.com/aws-cloudformation/cfn-python-lint/#lint-multiple-files

https://github.com/martysweet/cfn-lint#depreciationretirement-notice