Drop Python 3.9, add Python 3.11 to CI

Author: krassowski

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        PYTHON_VERSION: ['3.8']
+        PYTHON_VERSION: ['3.9']
     timeout-minutes: 10
     steps:
       - uses: actions/cache@v1

.github/workflows/test-linux.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        PYTHON_VERSION: ['3.10', '3.9', '3.8']
+        PYTHON_VERSION: ['3.11', '3.10', '3.9']
     timeout-minutes: 10
     steps:
       - uses: actions/cache@v4

.github/workflows/test-mac.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        PYTHON_VERSION: ['3.10', '3.9', '3.8']
+        PYTHON_VERSION: ['3.11', '3.10', '3.9']
     timeout-minutes: 10
     steps:
       - uses: actions/cache@v4

.github/workflows/test-win.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        PYTHON_VERSION: ['3.10', '3.9', '3.8']
+        PYTHON_VERSION: ['3.11', '3.10', '3.9']
     timeout-minutes: 10
     steps:
       - uses: actions/cache@v4

pyproject.toml

@@ -11,7 +11,7 @@ authors = [{name = "Python Language Server Contributors"}]
 description = "Python Language Server for the Language Server Protocol"
 readme = "README.md"
 license = {text = "MIT"}
-requires-python = ">=3.8"
+requires-python = ">=3.0"
 dependencies = [
     "docstring-to-markdown",
     "importlib_metadata>=4.8.3;python_version<\"3.10\"",
@@ -120,8 +120,8 @@ exclude = [
 line-length = 88
 indent-width = 4
 
-# Assume Python 3.8
-target-version = "py38"
+# Assume Python 3.9
+target-version = "py39"
 
 [tool.ruff.lint]
 # https://docs.astral.sh/ruff/rules/