Update the license year to 2021

[jasondegraw]

Pull request overview

Update the license year to 2021. There's a growing number of Python files in the repo, mostly without any license markings. We probably should change that at some point.

Pull Request Author

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[Myoldmopar]

Thanks @jasondegraw, and I agree. Do you want to modify the license search script to enforce the Python files we've added? I'm happy to do it but as you authored that stuff I'm happy to let you make the changes too. #8442 just hit the license year issue after an innocent merge from develop 😄

[jasondegraw]

@Myoldmopar I'd prefer to do it, there are a few things in the current scripts that could probably use some cleanup. There probably isn't too much to discuss beyond what might need to be excluded, but just in case I'll create a separate issue later today.

[Myoldmopar]

OK, this one is ready to go in, I'll add some changes to #8469 and then that can go in and we'll be in great shape with the license checking. Thanks @jasondegraw !