Copyrights years bump
It's that time of year again, yeah :(

There are 2 solutions for these:

* Make some script that will do the updates.
* Remove copyright years everywhere. I believe the "year" comes from US copyright notice standard, which was actually finally dropped in 1989, and nowadays people even come to their senses and stop using it:
  * Microsoft's typical notice does not add them: https://blogs.msdn.microsoft.com/sourceanalysis/2008/05/25/configuring-file-header-company-and-copyright/
  * .NET Foundation stopped adding years: https://forums.dotnetfoundation.org/t/file-headers-and-copyright-statements/1276

OTOH: 

* Berkeley still recommends to add years: https://ipira.berkeley.edu/software-copyright-notice-and-disclaimer
* Eclipse still recommends to add years: https://eclipse.org/projects/handbook/#ip-copyright-headers
* Apache still recommends to add years: http://www.apache.org/legal/src-headers.html#notice
* Google follows Apache recommendations and asks to add them: https://opensource.google.com/docs/releasing/preparing/#include-license-file-and-source-code-headers
* MIT standard text still requires years: https://spdx.org/licenses/MIT

What shall we do? I'm kind of tending towards removal.