Typst template fixes.

test/writer.typst

@@ -17,7 +17,8 @@
 
 #let conf(
   title: none,
-  authors: none,
+  authors: (),
+  keywords: (),
   date: none,
   abstract: none,
   cols: 1,
@@ -30,6 +31,11 @@
   sectionnumbering: none,
   doc,
 ) = {
+  set document(
+    title: title,
+    author: authors.map(author => author.name),
+    keywords: keywords,
+  )
   set page(
     paper: paper,
     margin: margin,
@@ -48,7 +54,7 @@
     ]]
   }
 
-  if authors != none {
+  if authors != none and authors != [] {
     let count = authors.len()
     let ncols = calc.min(count, 3)
     grid(
@@ -85,14 +91,14 @@
 #show: doc => conf(
   title: [Pandoc Test Suite],
   authors: (
-    ( name: [John MacFarlane],
-      affiliation: [],
-      email: [] ),
-    ( name: [Anonymous],
-      affiliation: [],
-      email: [] ),
+    ( name: "John MacFarlane",
+      affiliation: "",
+      email: "" ),
+    ( name: "Anonymous",
+      affiliation: "",
+      email: "" ),
     ),
-  date: [July 17, 2006],
+  date: "July 17, 2006",
   cols: 1,
   doc,
 )