copyright year needs an adjustment

[GitMensch]

the license file has

Copyright (C) 2016-2020 Klaralvdalens Datakonsult AB

Side note: Would you consider "updating" the license to GPLv3+?

[milianw]

why do you want to update the license?

[GitMensch]

The copyright year change in the was last done in 6f4dc6a.

I think that one either considers to specify the copyright for the license, in which case the current entry makes no sense, or to specify not also the license but also the copyright for the software in a single place, in which case the years should be updated.

@winterz just adjusted the license in https://github.com/KDAB/KDDockWidgets/blob/2.0/LICENSE.GPL.txt to explicit allow both license versions to be used (sadly it does not include "or any later version", but that's up to the copyright owner, of course).

For a general note about possible reasons to upgrade see https://www.gnu.org/licenses/rms-why-gplv3.html (for many the reason "I can link to GPLv3" will be the most relevant reason).

[milianw]

I believe the year is pretty meaningless - at least outside the US. But my colleague Allen (@winterz) regularly updates the year, which is fine by me.

Generally we try to use the same licenses for all our FOSS products here at kdab, are you saying KDDW is incompatible with hotspot? I doubt that, and if need be we can change the two licenses.

But I definitely do not intend to change the license "just because".

[winterz]

See #596 for cleaning-up the KDAB copyrights