chore: update contributors

Author: daviddias

package.json

@@ -64,6 +64,7 @@
     "Richard Littauer <richard.littauer@gmail.com>",
     "Stephen Whitmore <stephen.whitmore@gmail.com>",
     "greenkeeperio-bot <support@greenkeeper.io>",
-    "nginnever <ginneversource@gmail.com>"
+    "nginnever <ginneversource@gmail.com>",
+    "npmcdn-to-unpkg-bot <npmcdn-to-unpkg-bot@users.noreply.github.com>"
   ]
-}
+}