New release of LaTeXML

[Bruce Miller]

Hi All;
   I'd like to respectfully draw attention to
https://trac.macports.org/ticket/51818
I have created a new release of LaTeXML, version 0.8.2.
I've updated the Portfile accordingly (version, dependencies,
checksums), but don't have commit access.

This portfile incorporates the changes to fix tickets
https://trac.macports.org/ticket/47972
and https://trac.macports.org/ticket/49507

Thanks;
bruce