'module' argument to ForwardRef.__init__() added in Python 3.9.7 (#6017)

Pin Python 3.9.7 for stubtest and update 3.10.0 to rc2

Author: srittau

.github/workflows/tests.yml

@@ -112,7 +112,8 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10.0-rc.1"]
+        # Python 3.9.7 is required due to changes to ForwardRef.
+        python-version: ["3.6", "3.7", "3.8", "3.9.7", "3.10.0-rc.2"]
       fail-fast: false
 
     steps:

stdlib/typing.pyi

@@ -704,7 +704,8 @@ if sys.version_info >= (3, 7):
         __forward_evaluated__: bool
         __forward_value__: Any | None
         __forward_is_argument__: bool
-        if sys.version_info >= (3, 10):
+        if sys.version_info >= (3, 9):
+            # The module argument was added in Python 3.9.7.
             def __init__(self, arg: str, is_argument: bool = ..., module: Any | None = ...) -> None: ...
         else:
             def __init__(self, arg: str, is_argument: bool = ...) -> None: ...