Attempt to improve non-embedded Wingdings font support (bug 1652224)

Now that font-substitution has been implemented, we should be able to do much a better job at supporting non-embedded Wingdings fonts.
Given that this is a Windows-specific font, see https://en.wikipedia.org/wiki/Wingdings, this is however not guaranteed to work (well) on other platforms.

src/core/font_substitutions.js

@@ -281,6 +281,25 @@ const substitutionMap = new Map([
       fallback: "Helvetica-BoldOblique",
     },
   ],
+  [
+    "Wingdings",
+    {
+      local: ["Wingdings", "URW Dingbats"],
+      style: NORMAL,
+    },
+  ],
+  [
+    "Wingdings-Regular",
+    {
+      alias: "Wingdings",
+    },
+  ],
+  [
+    "Wingdings-Bold",
+    {
+      alias: "Wingdings",
+    },
+  ],
 ]);
 
 const fontAliases = new Map([["Arial-Black", "ArialBlack"]]);