build: use python 3.10 for testing (#891)

* build: use python 3.10 for testing

* set default_python_version to 3.10

Author: parthea

.github/workflows/lint.yml

@@ -12,7 +12,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.8"
+        python-version: "3.10"
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel

.github/workflows/unittest.yml

@@ -45,7 +45,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.8"
+        python-version: "3.10"
     - name: Install coverage
       run: |
         python -m pip install --upgrade setuptools pip wheel

noxfile.py

@@ -32,7 +32,7 @@
 ISORT_VERSION = "isort==5.10.1"
 LINT_PATHS = ["docs", "pandas_gbq", "tests", "noxfile.py", "setup.py"]
 
-DEFAULT_PYTHON_VERSION = "3.8"
+DEFAULT_PYTHON_VERSION = "3.10"
 
 
 UNIT_TEST_PYTHON_VERSIONS = ["3.8", "3.9", "3.10", "3.11", "3.12"]

owlbot.py

@@ -34,6 +34,7 @@
 }
 extras = ["tqdm", "geopandas"]
 templated_files = common.py_library(
+    default_python_version="3.10",
     unit_test_python_versions=["3.8", "3.9", "3.10", "3.11", "3.12"],
     system_test_python_versions=["3.8", "3.9", "3.10", "3.11", "3.12"],
     cov_level=96,