MAINT,DOC: Updating inline f2py licenses

[HaoZeke]

Almost every file in f2py includes:

Copyright 1999 - 2011 Pearu Peterson all rights reserved.

Or:

Copyright 1999,2000 Pearu Peterson all rights reserved,
Pearu Peterson <pearu@ioc.ee>

Or some variants of the above. IMO we should modify these to be:
(a)

Copyright 1999 - 2011 Pearu Peterson all rights reserved.
Copyright 2011 - 2023 NumPy Developers.

Or
(b)

Copyright 1999 -- 2011 Pearu Peterson all rights reserved.
Copyright 2011 -- present NumPy Developers.

Or (c)

Copyright Pearu Peterson all rights reserved.
Copyright NumPy Developers.

It isn't super important perhaps, but from a new user perspective it would be nice to give the semblence of maintainence. Also the email address is long disused. NumPy's License.txt covers 2005 to 2023.

Some discussions b/w @mattip and me are here.. Feel free to weigh in with an opinion or show support for (a) via 👍🏾 , (b) via 🚀 or (c) via 🎉 .

cc @pearu @melissawm