Log Message:
tex-morisawa{,-doc}: Add version 2020

From Atsushi Toyokura in pkgsrc-wip

The package enables selection of 5 standard Japanese fonts for
pLaTeX + dvips. It was originally written by Haruhiko Okumura
as part of jsclasses bundle, and the TFM/VF files were
previously distributed as part of the ptex-fonts package.