s0artcl: droidmono was renamed to droidsansmono

Signed-off-by: Roland Hieber <rohieb@rohieb.name>

s0artcl.dtx

@@ -169,10 +169,19 @@
 \renewcommand*{\encodingdefault}{T1}
 %    \end{macrocode}
 %
-% Droid for all the rest:
+% Use Droid as default font.
+%
+% Since version 3.0, released on 2019/06/20, the Monospace package is
+% named \textsf{droidsansmono}, in previous versions it is named \textsf{droidmono}. We need to load
+% a package first to inspect its version string, but luckily we can infer the version from the
+% already loaded \textsf{droidsans} package.
 %    \begin{macrocode}
 \RequirePackage[default]{droidsans}
-\RequirePackage[defaultmono]{droidmono}
+\@ifpackagelater{droidsans}{2019/06/20}{
+	\RequirePackage[defaultmono]{droidsansmono}
+}{
+	\RequirePackage[defaultmono]{droidmono}
+}
 %    \end{macrocode}
 %
 % \Finale