Bump New CM fonts to version 8.0.0

[mkorje]

Whilst it isn't on CTAN just yet, the release is available at https://download.gnu.org.ua/pub/releases/newcm/.

Take note of the change in licensing. The fonts are being moved to GPLv3 or later with the font exception and a new (to the best of my knowledge) Distribution Exception:

If you distribute the fonts as they are in your program, and your program
follows a license compatible with GPL version 3 (or later) as described in
https://www.gnu.org/licenses/license-list.en.html these fonts do not by
themselves cause the resulting program to be covered by the GNU General Public
License. This exception does not however invalidate any other reasons why the
program might be covered by the GNU General Public License. If however you
distribute a copy of the fonts that modifies either the glyphs (one or more) or
the glyph-set by adding or removing glyphs, this exception is invalidated and
your program has to follow GPL version 3 (or later).

Only the NewCM10-Regular font is licensed under this at the moment, but all the fonts will be moved under this license in the future.

[mkorje]

I will update the license text/format to match exactly what was uploaded to CTAN soon. Done.

[laurmaedje]

Thanks!