Fix XML parsing

lib/xml.ex

@@ -11,15 +11,15 @@ defmodule FeedParser.XML do
 
   @spec parse(data :: String.t()) :: {:ok, tuple()} | {:error, String.t()}
   def parse(data) do
-    {doc, _} =
-      try do
+    try do
+      {doc, _} =
         data
         |> :binary.bin_to_list()
         |> :xmerl_scan.string()
-      catch
-        :exit, reason -> {:error, "parsing XML failed: #{inspect(reason)}"}
-      end
 
-    doc
+      {:ok, doc}
+    catch
+      :exit, reason -> {:error, "parsing XML failed: #{inspect(reason)}"}
+    end
   end
 end