Log Message:
tex-ptex2pdf{,-doc}: Add version 20200520.0

From Atsushi Toyokura in pkgsrc-wip

The Lua script provides system-independent support of Japanese
typesetting engines in TeXworks. As TeXworks typesetting setup
does not allow for multistep processing, this script runs one
of the ptex-based programs (ptex, uptex, eptex, platex,
uplatex) followed by dvipdfmx.