Upgrade base Python version to 3.10 (#1449)

Author: ulgens

.github/workflows/deploy.yml

@@ -11,10 +11,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python 3.9
+    - name: Set up Python 3.10
       uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: "3.10"
     - name: Build wheel and source tarball
       run: |
         pip install wheel

.github/workflows/lint.yml

@@ -8,10 +8,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python 3.9
+    - name: Set up Python 3.10
       uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: "3.10"
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.pre-commit-config.yaml

@@ -1,5 +1,5 @@
 default_language_version:
-  python: python3.9
+  python: python3.10
 
 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks

tox.ini

@@ -11,7 +11,7 @@ commands =
     py{36,37,38,39,310}: pytest --cov=graphene graphene --cov-report=term --cov-report=xml examples {posargs}
 
 [testenv:pre-commit]
-basepython = python3.9
+basepython = python3.10
 deps =
     pre-commit>=2.16,<3
 setenv =
@@ -20,7 +20,7 @@ commands =
     pre-commit run --all-files --show-diff-on-failure
 
 [testenv:mypy]
-basepython = python3.9
+basepython = python3.10
 deps =
     mypy>=0.950,<1
 commands =