Hello,
I have solved my problem. I was using an example of the font in which, for
unknown reasons, the required lookups did not exist.
I could see this using Fontforge, font info / lookups.
I have just replaced the example with another one that had the required lookup.
All I had then to do was to add in my. sty file:
\renewcommand{\textsw}[1]{{\fontspec[BoldFont={MinionPro-SemiboldIt},
ItalicFont={MinionPro-It}, BoldItalicFont={MinionPro-SemiboldIt},
Style=Swash]{MinionPro-It}{#1}}}%
The typeset is now correct:
\begin{center}
\textsw{\textbf{Ode to Autumn, by Keats}}
\end{center}
\textsw{Season of mists and mellow fruitfulness,}\\
\textsw{Close bosom friend of the maturing sun…}
So, there wasn’t any issue with fonstpec nor with texlive 2020.
All best,
Joël
Joël Mouric
[email protected]