Make Python 3.10 support official (#5265)

.github/workflows/checks.yml

@@ -8,10 +8,10 @@ jobs:
       fail-fast: false
       matrix:
         include:
-        - python-version: 3.9
+        - python-version: "3.10"
           env:
             TOXENV: security
-        - python-version: 3.9
+        - python-version: "3.10"
           env:
             TOXENV: flake8
         # Pylint requires installing reppy, which does not support Python 3.9
@@ -20,10 +20,10 @@ jobs:
           env:
             TOXENV: pylint
             TOX_PIP_VERSION: 20.3.3
-        - python-version: 3.9
+        - python-version: 3.6
           env:
             TOXENV: typing
-        - python-version: 3.8  # Keep in sync with .readthedocs.yml
+        - python-version: "3.10"  # Keep in sync with .readthedocs.yml
           env:
             TOXENV: docs
 

.github/workflows/publish.yml

@@ -9,10 +9,10 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Set up Python 3.9
+    - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: "3.10"
 
     - name: Check Tag
       id: check-release-tag

.github/workflows/tests-macos.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
 
     steps:
     - uses: actions/checkout@v2

.github/workflows/tests-ubuntu.yml

@@ -17,6 +17,12 @@ jobs:
         - python-version: 3.9
           env:
             TOXENV: py
+        - python-version: "3.10"
+          env:
+            TOXENV: py
+        - python-version: "3.10"
+          env:
+            TOXENV: asyncio
         - python-version: pypy3
           env:
             TOXENV: pypy3
@@ -42,14 +48,6 @@ jobs:
             TOXENV: extra-deps
             TOX_PIP_VERSION: 20.3.3
 
-        # 3.10-pre
-        - python-version: "3.10.0-beta.4"
-          env:
-            TOXENV: py
-        - python-version: "3.10.0-beta.4"
-          env:
-            TOXENV: asyncio
-
     steps:
     - uses: actions/checkout@v2
 

.readthedocs.yml

@@ -5,12 +5,13 @@ sphinx:
   fail_on_warning: true
 
 build:
-  image: latest
+  os: ubuntu-20.04
+  tools:
+    # For available versions, see:
+    # https://docs.readthedocs.io/en/stable/config-file/v2.html#build-tools-python
+    python: "3.10"  # Keep in sync with .github/workflows/checks.yml
 
 python:
-  # For available versions, see:
-  # https://docs.readthedocs.io/en/stable/config-file/v2.html#build-image
-  version: 3.8  # Keep in sync with .github/workflows/checks.yml
   install:
     - requirements: docs/requirements.txt
     - path: .

setup.py

@@ -87,6 +87,7 @@ setup(
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Internet :: WWW/HTTP',

tox.ini

@@ -41,6 +41,7 @@ deps =
     types-pyOpenSSL==20.0.3
     types-setuptools==57.0.0
 commands =
+    pip install types-dataclasses  # remove once py36 support is dropped
     mypy --show-error-codes {posargs: scrapy tests}
 
 [testenv:security]