Test on newer Python versions

Author: Zac-HD

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.6', '3.7', '3.8', '3.9']
+        python: ['3.7', '3.8', '3.9', '3.10', '3.11']
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -35,7 +35,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['pypy-3.6', '3.6', '3.7', '3.8', '3.9', '3.8-dev', '3.9-dev']
+        python: ['pypy-3.7', '3.7', 'pypy-3.8', '3.8', 'pypy-3.9', '3.9', '3.10', '3.11']
         check_formatting: ['0']
         check_docs: ['0']
         extra_name: ['']
@@ -74,7 +74,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.6', '3.7', '3.8', '3.9']
+        python: ['3.7', '3.8', '3.9', '3.10', '3.11']
     steps:
       - name: Checkout
         uses: actions/checkout@v2

setup.py

@@ -28,14 +28,19 @@
         'testing',
         'trio',
     ],
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     classifiers=[
         "License :: OSI Approved :: MIT License",
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: POSIX :: Linux",
         "Operating System :: MacOS :: MacOS X",
         "Operating System :: Microsoft :: Windows",
         "Programming Language :: Python :: 3 :: Only",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: System :: Networking",