Re-introduce python 3.8 support

Close #33

.github/workflows/pythonpackage.yaml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         platform: [ubuntu-latest, macos-latest] #, windows-latest]
 
     runs-on: ${{ matrix.platform }}

README.md

@@ -1,4 +1,4 @@
-[![Python: 3.9, 3.10, 3.11, 3.12](https://img.shields.io/badge/python-3.9%20%7C%203.10%20%7C%203.11%20%7C%203.12-blue)](https://www.python.org)
+[![Python: 3.8, 3.9, 3.10, 3.11, 3.12](https://img.shields.io/badge/python-3.8%20%7C%203.9%20%7C%203.10%20%7C%203.11%20%7C%203.12-blue)](https://www.python.org)
 ![GitHub](https://img.shields.io/github/license/agrenott/pyhgtmap)
 ![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/agrenott/pyhgtmap/pythonpackage.yaml)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)

pyproject.toml

@@ -38,7 +38,7 @@ keywords = ["osm", "OpenStreetMap", "countour", "SRTM", "elevation"]
 license = "GPL-2.0-or-later"
 name = "pyhgtmap"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.8"
 
 [project.optional-dependencies]
 geotiff = [
@@ -92,7 +92,7 @@ test_cov = [
 typing = "mypy {args}"
 
 [[tool.hatch.envs.test.matrix]]
-python = ["3.9", "3.10", "3.11", "3.12"]
+python = ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
 [tool.hatch.envs.geotiff]
 # Env for optional geotiff dependencies