Removed explicit copyright end year from LICENSE

Constantly having to keep this year updated to the present year seems to simply be a long-standing norm
in the open source community, rather than something that's legally required.
There doesn't seem to be a consensus on exactly what to remove and what to keep, however,
so replacing the end year with "present" seems like the most conservative option that still removes the need
to constantly keep the year updated.

This was inspired by tox-dev/tox#2941, which also links to a couple other "testimonies":
* https://daniel.haxx.se/blog/2023/01/08/copyright-without-years/
* https://hynek.me/til/copyright-years/

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017-2023 MAKE NTNU
+Copyright (c) 2017-present, MAKE NTNU
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal