refa(tests): enable async true in check in test

Author: solnic

test/sentry/check_in_test.exs

@@ -1,5 +1,5 @@
 defmodule Sentry.CheckInTest do
-  use Sentry.Case, async: false
+  use Sentry.Case, async: true
 
   alias Sentry.CheckIn
 

test/sentry/live_view_hook_test.exs

@@ -130,7 +130,7 @@ defmodule SentryTest.Endpoint do
 end
 
 defmodule Sentry.LiveViewHookTest do
-  use Sentry.Case, async: false
+  use Sentry.Case, async: true
 
   import Phoenix.ConnTest
   import Phoenix.LiveViewTest