Merge branch 'chore/elixir-1.11' into 'develop'

Elixir 1.11 compatibility / Phoenix 1.5+

See merge request pleroma/pleroma!3059

test/support/channel_case.ex

@@ -22,7 +22,7 @@ defmodule Pleroma.Web.ChannelCase do
   using do
     quote do
       # Import conveniences for testing with channels
-      use Phoenix.ChannelTest
+      import Phoenix.ChannelTest
       use Pleroma.Tests.Helpers
 
       # The default endpoint for testing

test/support/conn_case.ex

@@ -22,7 +22,8 @@ defmodule Pleroma.Web.ConnCase do
   using do
     quote do
       # Import conveniences for testing with connections
-      use Phoenix.ConnTest
+      import Plug.Conn
+      import Phoenix.ConnTest
       use Pleroma.Tests.Helpers
       import Pleroma.Web.Router.Helpers