chore: drop support for python 3.7, test under python 3.12

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v3

.pre-commit-config.yaml

@@ -31,13 +31,13 @@ repos:
   rev: 'v3.15.0'
   hooks:
     - id: pyupgrade
-      args: ["--py37-plus"]
+      args: ["--py38-plus"]
 
 - repo: https://github.com/asottile/reorder_python_imports
   rev: v3.12.0
   hooks:
     - id: reorder-python-imports
-      args: ["--py37-plus"]
+      args: ["--py38-plus"]
 
 - repo: https://github.com/PyCQA/flake8
   rev: '6.1.0'

lektor_index_pages/sourceobj.py

@@ -5,13 +5,13 @@
 
 import hashlib
 import pickle
-import sys
 from collections.abc import Hashable
 from itertools import chain
 from operator import itemgetter
 from typing import Any
 from typing import Callable
 from typing import Iterable
+from typing import Literal
 from typing import Sequence
 from typing import TYPE_CHECKING
 from typing import TypeVar
@@ -28,11 +28,6 @@
 from more_itertools import unique_everseen
 from werkzeug.utils import cached_property
 
-if sys.version_info >= (3, 8):
-    from typing import Literal
-else:
-    from typing_extensions import Literal
-
 if TYPE_CHECKING:
     from lektor.builder import PathCache
     from lektor.db import Record