Update pytest to version 6

Author: Cito

poetry.lock

@@ -32,10 +32,10 @@ packages = [
 python = "^3.6"
 
 [tool.poetry.dev-dependencies]
-pytest = "^5.4"
+pytest = "^6.2"
 pytest-asyncio = ">=0.14,<1"
 pytest-benchmark = "^3.2"
-pytest-cov = "^2.10"
+pytest-cov = "^2.11"
 pytest-describe = "^1.0"
 pytest-timeout = "^1.4"
 black = "20.8b1"

pyproject.toml

@@ -1,5 +1,5 @@
 from copy import deepcopy
-from typing import Dict, Generic, TypeVar
+from typing import Dict, TypeVar
 
 from .frozen_error import FrozenError
 

src/graphql/pyutils/frozen_dict.py

@@ -1,5 +1,5 @@
 from copy import deepcopy
-from typing import Generic, List, TypeVar
+from typing import List, TypeVar
 
 from .frozen_error import FrozenError
 

src/graphql/pyutils/frozen_list.py

@@ -39,10 +39,10 @@ whitelist_externals = poetry
 setenv =
     PYTHONPATH = {toxinidir}
 deps =
-    pytest>=5.4,<5.5
+    pytest>=6.2,<7
     pytest-asyncio>=0.14,<1
     pytest-benchmark>=3.2,<4
-    pytest-cov>=2.10,<3
+    pytest-cov>=2.11,<3
     pytest-describe>=1,<2
     pytest-timeout>=1.4,<2
 commands =