Fix failing tests

Author: aleDsz

lib/livebook/file_system/git/client.ex

@@ -150,6 +150,8 @@ defmodule Livebook.FileSystem.Git.Client do
   end
 
   defp with_ssh_key_file(file_system, fun) when is_function(fun, 1) do
+    File.mkdir_p!(Livebook.Config.tmp_path())
+
     key_path = FileSystem.Git.key_path(file_system)
     pem_entry = :public_key.pem_decode(file_system.key)
     ssh_key = :public_key.pem_encode(pem_entry)

test/livebook_teams/web/hub/edit_live_test.exs

@@ -18,6 +18,8 @@ defmodule LivebookWeb.Integration.Hub.EditLiveTest do
       if tags[:git] do
         Livebook.FileSystem.Mounter.subscribe(team.id)
       end
+
+      :ok
     end
 
     test "updates the hub", %{conn: conn, team: team} do