make todo commands accept optional arguments

src/wrappers/todo/todo.pysty

@@ -9,18 +9,18 @@ __HEADER__(Easy standards for the todonotes package)
 
 \setuptodonotes{tickmarkheight=0.1cm, size=\small}
 
-\newcommand\todoref{
-    \todo[color=red!40]{Add reference.}
+\NewDocumentCommand\todoref{O{}}{
+    \todo[color=red!40, #1]{Add reference.}
 }
 
-\newcommand\todoquestion{
-    \todo[color=black!10, size=\tiny]
+\NewDocumentCommand\todoquestion{O{}}{
+    \todo[color=black!10, size=\tiny, #1]
 }
 
-\newcommand\todotex{
-    \todo[color=green!75!black]
+\NewDocumentCommand\todotex{O{}}{
+    \todo[color=green!75!black, #1]
 }
 
-\newcommand\todotypo{
-    \todo[color=blue!40, size=\tiny]{Typo corrected, double check this.}
+\NewDocumentCommand\todotypo{O{}}{
+    \todo[color=blue!40, size=\tiny, #1]{Typo corrected, double check this.}
 }