Drop support for Python 3.8 (#500)

Author: AlexWaygood

.flake8

@@ -19,7 +19,7 @@
 #
 # flake8-bugbear rules that cause too many false positives:
 #       B905 "`zip()` without an explicit `strict=True` parameter --
-#           the `strict` parameter was introduced in Python 3.10; we support Python 3.8
+#           the `strict` parameter was introduced in Python 3.10; we support Python 3.9
 #       B907 "Use !r inside f-strings instead of manual quotes" --
 #           produces false positives if you're surrounding things with double quotes
 

.github/workflows/check.yml

@@ -29,17 +29,13 @@ jobs:
     timeout-minutes: 5
     strategy:
       matrix:
-        python-version: ["3.8", "3.13"]
+        python-version: ["3.9", "3.13"]
       fail-fast: false
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          # Need to use Python 3.8 for the mypy-3.8 job,
-          # or `ast_decompiler` isn't installed by `uv pip install -e '.[dev]'`,
-          # and `ast_decompiler` must be installed for the typecheck to succeed
-          # with `--python-version=3.8
-          python-version: "3.8"
+          python-version: "3.12"
           allow-prereleases: true
       - run: curl -LsSf https://astral.sh/uv/install.sh | sh
       - run: uv pip install -e .[dev] --system
@@ -66,7 +62,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
       fail-fast: false
     steps:
       - uses: actions/checkout@v4

.pre-commit-config.yaml

@@ -12,7 +12,7 @@ repos:
     rev: 24.4.2 # must match pyproject.toml
     hooks:
       - id: black
-        language_version: python3.8
+        language_version: python3.9
   - repo: https://github.com/pycqa/isort
     rev: 5.13.2 # must match pyproject.toml
     hooks:

CHANGELOG.md

@@ -6,6 +6,11 @@ Bugfixes
 * Don't emit Y053 for long strings inside `Literal` slices or
   metadata strings inside `Annotated` slices.
 
+Other changes:
+* `flake8-pyi` no longer supports being run using Python 3.8.
+  As a result, it not longer depends on the third-party
+  `ast_decompiler` package.
+
 ## 24.6.0
 
 Bugfixes