Update ruff.toml and noxfile to run on 3.10

Author: holtskinner

.ruff.toml

@@ -9,7 +9,7 @@
 line-length = 80 # Google Style Guide §3.2: 80 columns
 indent-width = 4 # Google Style Guide §3.4: 4 spaces
 
-target-version = "py313" # Minimum Python version
+target-version = "py310" # Minimum Python version
 
 [lint]
 ignore = [

noxfile.py

@@ -23,7 +23,7 @@
 import nox
 
 
-DEFAULT_PYTHON_VERSION = '3.13'
+DEFAULT_PYTHON_VERSION = '3.10'
 
 CURRENT_DIRECTORY = pathlib.Path(__file__).parent.absolute()
 
@@ -127,7 +127,7 @@ def format(session):
             session.run(
                 'pyupgrade',
                 '--exit-zero-even-if-changed',
-                '--py313-plus',
+                '--py310-plus',
                 *lint_paths_py,
             )
         session.run(