Update the license year to present

[jasondegraw]

Pull request overview

Description of the purpose of this PR

This PR updates the license year to "present" to reduce the impact of the arrival of a new year on developers. I've also returned the update script to the less easy-to-use form as it hopefully won't need any further use going forward. The checking script is still using the original approach to producing the various versions of the license (starting with the original and then making the changes needed to get the "current" and "previous" versions of the text. Those could easily be transitioned to static text now. I haven't done that because the Python version line breaking is happening differently due to the addition 3 characters in "present". I don't believe that will be a problem but will need to check for both Python and C++ in an IDE (or maybe just via the formatting?) before unflipping the draft bit.

Pull Request Author

• Title of PR should be user-synopsis style (clearly understandable in a standalone changelog context)
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• Author should provide a "walkthrough" of relevant code changes using a GitHub code review comment process

Reviewer

• Perform a Code Review on GitHub
• If branch is behind develop, merge develop and build locally to check for side effects of the merge
• CI status: all green or justified