fixed accidentally removed child_spec

Author: zookzook

lib/mongo.ex

@@ -143,6 +143,11 @@ defmodule Mongo do
     |> Topology.start_link()
   end
 
+  def child_spec(opts) do
+    %{id: Mongo,
+      start: {Mongo, :start_link, [opts]}}
+  end
+
   @doc """
   Generates a new `BSON.ObjectId`.
   """

lib/mongo/app.ex

@@ -1,13 +1,18 @@
 defmodule Mongo.App do
   @moduledoc false
 
+  use Application
+
   def start(_type, _args) do
-    import Supervisor.Spec, warn: false
 
     children = [
       {Mongo.IdServer, []},
       {Mongo.PBKDF2Cache, []},
-      supervisor(Registry, [:duplicate, :events_registry])
+      %{
+        id: Registry,
+        start: {Registry, :start_link, [:duplicate, :events_registry]},
+        type: :supervisor
+      }
     ]
 
     opts = [strategy: :one_for_one, name: Mongo.Supervisor]