Setup Python 3.10 support

Author: asvetlov

.github/workflows/ci.yml

@@ -22,10 +22,8 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v2
-    - name: Setup Python 3.8
+    - name: Setup Python
       uses: actions/setup-python@v2
-      with:
-        python-version: 3.8
     - name: Cache PyPI
       uses: actions/cache@v2
       with:
@@ -76,7 +74,7 @@ jobs:
     needs: [lint]
     strategy:
       matrix:
-        pyver: [3.6, 3.7, 3.8, 3.9]
+        pyver: ['3.6', '3.7', '3.8', '3.9', '3.10']
         os: [ubuntu, macos, windows]
         include:
           - pyver: pypy3
@@ -138,18 +136,16 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v2
-    - name: Setup Python 3.8
+    - name: Setup Python
       uses: actions/setup-python@v2
-      with:
-        python-version: 3.8
     - name: Install dependencies
       run:
         python -m pip install -U pip wheel
     - name: Make dists
       run:
         python setup.py sdist bdist_wheel
     - name: Release
-      uses: aio-libs/create-release@master
+      uses: aio-libs/create-release@v1.2.2
       with:
         changes_file: CHANGES.rst
         name: aiosignal

setup.py

@@ -43,6 +43,7 @@ def read(f):
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
         'Development Status :: 5 - Production/Stable',
         'Operating System :: POSIX',
         'Operating System :: MacOS :: MacOS X',