disable http/2 tests by default

Author: the-mikedavis

test/mint/web_socket_test.exs

@@ -56,6 +56,7 @@ defmodule Mint.WebSocketTest do
       [conn: conn]
     end
 
+    @tag :http2
     test "we can send and hello-world frame and receive an echo reply", %{conn: conn} do
       {:ok, conn, ref} =
         Mint.WebSocket.upgrade(conn, "/", [], extensions: [Mint.WebSocket.PerMessageDeflate])

test/test_helper.exs

@@ -1,3 +1,3 @@
 :websocket_sup.start_link()
-ExUnit.configure(assert_receive_timeout: 500, exclude: [compression: :stress])
+ExUnit.configure(assert_receive_timeout: 500, exclude: [:http2, compression: :stress])
 ExUnit.start()