Revert "Roll back from __future__ import annotations for Python 3.6"

This reverts commit b8ce4ad.

Signed-off-by: Stavros Ntentos <133706+stdedos@users.noreply.github.com>

Author: stdedos

pylint_pytest/checkers/class_attr_loader.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from astroid import Assign, Attribute, ClassDef, Name
 
 from ..utils import _can_use_fixture, _is_class_autouse_fixture

pylint_pytest/checkers/fixture.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import fnmatch
 import os
 import sys

pylint_pytest/checkers/types.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import sys
 from pprint import pprint
 from typing import Any

tests/base_tester.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 import sys
 from abc import ABC

tests/base_tester_test.py

@@ -20,7 +20,7 @@ class NoMsgIDSubclass(BasePytestTester):
             pass
 
 
-@pytest.mark.parametrize("msg_id", [123, None, ""], ids=lambda x: f"msg_id={x}")
+@pytest.mark.parametrize("msg_id", [123, None, ""], ids=lambda msg_id: f"{msg_id=}")
 def test_init_subclass_invalid_msg_id_type(msg_id):
     with pytest.raises(TypeError):