Add support for Python 3.11

Author: dmtucker

.github/workflows/validation.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v2

setup.py

@@ -38,7 +38,8 @@ def read(fname):
         'pytest>=6.2; python_version>="3.10"',
         'mypy>=0.500; python_version<"3.8"',
         'mypy>=0.700; python_version>="3.8" and python_version<"3.9"',
-        'mypy>=0.780; python_version>="3.9"',
+        'mypy>=0.780; python_version>="3.9" and python_version<"3.11"',
+        'mypy>=0.900; python_version>="3.11"',
     ],
     classifiers=[
         "Development Status :: 4 - Beta",

tests/test_pytest_mypy.py

@@ -402,7 +402,7 @@ def pyfunc(x: int) -> str:
 
     child = testdir.spawn_pytest(
         "--mypy --looponfail " + str(pyfile),
-        expect_timeout=30.0,
+        expect_timeout=60.0,
     )
 
     num_tests = 2

tox.ini

@@ -8,6 +8,7 @@ envlist =
     py38-pytest{4.6, 5.0, 5.x, 6.0, 6.x, 7.0, 7.x}-mypy{0.71, 0.7x, 0.80, 0.8x, 0.90, 0.9x}
     py39-pytest{4.6, 5.0, 5.x, 6.0, 6.x, 7.0, 7.x}-mypy{0.78, 0.7x, 0.80, 0.8x, 0.90, 0.9x}
     py310-pytest{6.2, 6.x, 7.0, 7.x}-mypy{0.78, 0.7x, 0.80, 0.8x, 0.90, 0.9x}
+    py311-pytest{6.2, 6.x, 7.0, 7.x}-mypy{0.90, 0.9x}
     publish
     static
 
@@ -18,6 +19,7 @@ python =
     3.8: py38-pytest{4.6, 5.0, 5.x, 6.0, 6.x, 7.0, 7.x}-mypy{0.71, 0.7x, 0.80, 0.8x, 0.90, 0.9x}, publish, static
     3.9: py39-pytest{4.6, 5.0, 5.x, 6.0, 6.x, 7.0, 7.x}-mypy{0.78, 0.7x, 0.80, 0.8x, 0.90, 0.9x}
     3.10: py310-pytest{6.2, 6.x, 7.0, 7.x}-mypy{0.78, 0.7x, 0.80, 0.8x, 0.90, 0.9x}
+    3.11: py311-pytest{6.2, 6.x, 7.0, 7.x}-mypy{0.90, 0.9x}
 
 [testenv]
 deps =