Merge branch 'tex_require_mathpartir' into 'master'

Add requirement of mathpartir to pftools.sty

See merge request iris/iris!1087

tex/pftools.sty

@@ -10,6 +10,7 @@
 \RequirePackage{Tabbing}	% Avoid the standard tabbing environment. Its \< conflicts with the semantic package.
 \RequirePackage{xparse}
 \RequirePackage{xcolor}
+\RequirePackage{mathpartir}
 
 %% COLOR DEFINITIONS
 \definecolor{rescolor}{HTML}{005504}