refactor: raise minimum version from python 3.8 -> python 3.9

This commit is expected to land at a time close to or after 2024-10-01,
following which Python 3.8 will be end-of-life. Several tools already
require a Python version >=3.9, which has caused dependency resolution
issues for some time now. Python 3.9 changed the workings of the type
system  quite substantially. This will allow for a higher code quality
going forwards.

BREAKING CHANGE: Python 3.8 is no longer supported as of this commit.

To migrate, update your system's Python version.

.github/workflows/ci-lint-test.yml

@@ -53,8 +53,8 @@ jobs:
     strategy:
       matrix:
         # 5 versions / years of coverage
-        python: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy3.9", "pypy3.10"]
-        os: [ubuntu-latest, macos-13, windows-latest]
+        python: ["3.9", "3.10", "3.11", "3.12", "3.13", "pypy3.9", "pypy3.10"]
+        os: [ubuntu-latest, macos-latest-large, windows-latest]
     steps:
       - name: "[INIT] Checkout repository"
         uses: actions/checkout@v4

.pre-commit-config.yaml

@@ -44,7 +44,7 @@ repos:
       - id: markdownlint
 
   - repo: https://github.com/abravalheri/validate-pyproject
-    rev: v0.15
+    rev: v0.18
     hooks:
       - id: validate-pyproject
 

proselint/checks/restricted/elementary.py

@@ -16,10 +16,7 @@
 
 from __future__ import annotations
 
-try:
-    from importlib.resources import files
-except ImportError:
-    from importlib_resources import files
+from importlib.resources import files
 
 import proselint
 from proselint.checks import CheckSpec, ReverseExistence

proselint/checks/restricted/top1000.py

@@ -16,10 +16,7 @@
 
 from __future__ import annotations
 
-try:
-    from importlib.resources import files
-except ImportError:
-    from importlib_resources import files
+from importlib.resources import files
 
 import proselint
 from proselint.checks import CheckSpec, ReverseExistence