Add support for Python 3.8 (#37)

* Add support for Python 3.8

* Use typing.List instead of list

* Sort imports

.github/workflows/test_and_lint.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
     name: py ${{ matrix.python-version }}
     steps:
       - uses: actions/checkout@v3

altair_tiles/__init__.py

@@ -3,7 +3,7 @@
 
 import math
 from dataclasses import dataclass
-from typing import Final, Optional, Union, cast
+from typing import Final, List, Optional, Union, cast
 
 import altair as alt
 import mercantile as mt
@@ -354,7 +354,7 @@ class _XYMinMax:
     y_max: int
 
 
-def _bounds_to_x_y_min_max(bounds: list[list[float]], zoom: int) -> _XYMinMax:
+def _bounds_to_x_y_min_max(bounds: List[List[float]], zoom: int) -> _XYMinMax:
     south_west, north_east = bounds
     south, west = south_west
     north, east = north_east

pyproject.toml

@@ -18,12 +18,13 @@ dependencies = ["altair", "xyzservices", "mercantile"]
 description = "altair_tiles"
 readme = "README.md"
 keywords = ["altair", "basemaps", "tiles"]
-requires-python = ">=3.9"
+requires-python = ">=3.8"
 dynamic = ["version"]
 license-files = { paths = ["LICENSE"] }
 classifiers = [
     "License :: OSI Approved :: BSD License",
     "Natural Language :: English",
+    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -86,8 +87,11 @@ build-and-publish = ["clean", "build", "publish"]
 
 
 [tool.ruff]
-target-version = "py39"
+target-version = "py38"
 line-length = 88
+exclude = [".git", "build", "__pycache__"]
+
+[tool.ruff.lint]
 select = [
     # flake8-bugbear
     "B",
@@ -134,9 +138,8 @@ ignore = [
     "ISC003",
     "ISC001",
 ]
-exclude = [".git", "build", "__pycache__"]
 
-[tool.ruff.per-file-ignores]
+[tool.ruff.lint.per-file-ignores]
 # Allow assert statements in test files
 "tests/**/*.py" = ["S101"]