rich media: oembed: return data in the same format as the other parsers

lib/pleroma/web/rich_media/parsers/oembed_parser.ex

@@ -22,6 +22,10 @@ defmodule Pleroma.Web.RichMedia.Parsers.OEmbed do
   defp get_oembed_data(url) do
     {:ok, %Tesla.Env{body: json}} = Pleroma.HTTP.get(url)
 
-    {:ok, Poison.decode!(json)}
+    {:ok, data} = Jason.decode(json)
+
+    data = data |> Map.new(fn {k, v} -> {String.to_atom(k), v} end)
+
+    {:ok, data}
   end
 end