SCons: Bump minimum Python version (3.8 → 3.9)

.github/workflows/linux_builds.yml

@@ -160,7 +160,7 @@ jobs:
         uses: ./.github/actions/godot-deps
         with:
           # Sync with Ensure*Version in SConstruct.
-          python-version: 3.8
+          python-version: 3.9
           scons-version: 4.0
 
       - name: Force remove preinstalled .NET SDKs

.pre-commit-config.yaml

@@ -58,7 +58,7 @@ repos:
         types_or: [text]
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.14.1 # Latest version that supports Python 3.8
+    rev: v1.19.1
     hooks:
       - id: mypy
         files: \.py$

SConstruct

@@ -2,7 +2,7 @@
 from misc.utility.scons_hints import *
 
 EnsureSConsVersion(4, 0)
-EnsurePythonVersion(3, 8)
+EnsurePythonVersion(3, 9)
 
 # System
 import glob

pyproject.toml

@@ -10,12 +10,12 @@ warn_redundant_casts = true
 warn_return_any = true
 warn_unreachable = true
 exclude = ["thirdparty/"]
-python_version = "3.8"
+python_version = "3.9"
 
 [tool.ruff]
 extend-exclude = ["thirdparty"]
 extend-include = ["*SConstruct", "*SCsub"]
-target-version = "py38"
+target-version = "py39"
 line-length = 120
 preview = true
 fix = true