Using unittest.mock instead of mock (#504)

Also Running gql-cli --version test in subprocess mode to try to fix flaky test

setup.py

@@ -19,7 +19,6 @@
     "pytest-asyncio==0.21.1",
     "pytest-console-scripts==1.3.1",
     "pytest-cov==5.0.0",
-    "mock==4.0.2",
     "vcrpy==4.4.0",
     "aiofiles",
 ]

tests/test_cli.py

@@ -370,6 +370,7 @@ def test_cli_get_transport_no_protocol(parser):
         get_transport(args)
 
 
+@pytest.mark.script_launch_mode("subprocess")
 def test_cli_ep_version(script_runner):
     ret = script_runner.run("gql-cli", "--version")
 

tests/test_client.py

@@ -1,7 +1,7 @@
 import os
 from contextlib import suppress
+from unittest import mock
 
-import mock
 import pytest
 from graphql import build_ast_schema, parse