drop python 3.9 support

Author: braingram

.github/workflows/ci.yml

@@ -24,18 +24,22 @@ jobs:
     uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v2
     with:
       submodules: false
-      # Any env name which does not start with `pyXY` will use this Python version.
-      default_python: '3.10'
       envs: |
+        - linux: coverage
+          name: Python 3.14 coverage
+          python-version: 3.14
+        - linux: coverage
+          name: Python 3.13 coverage
+          python-version: 3.13
+        - linux: coverage
+          name: Python 3.12 coverage
+          python-version: 3.12
         - linux: coverage
           name: Python 3.11 coverage
           python-version: 3.11
         - linux: coverage
           name: Python 3.10 coverage
           python-version: 3.10
-        - linux: coverage
-          name: Python 3.9 coverage
-          python-version: 3.9
       coverage: 'codecov'
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
@@ -45,24 +49,17 @@ jobs:
     uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v2
     with:
       submodules: false
-      # Any env name which does not start with `pyXY` will use this Python version.
-      default_python: '3.9'
       envs: |
-        - macos: py39-parallel
-        - windows: py39-parallel
+        - macos: py313-parallel
+        - windows: py313-parallel
 
   dev:
     needs: [core]
     uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v2
     with:
       submodules: false
-      # Any env name which does not start with `pyXY` will use this Python version.
-      default_python: '3.9'
       envs: |
-        - linux: py39-devdeps-parallel
-        - linux: py310-devdeps-parallel
-        - linux: py311-devdeps-parallel
-        - linux: py312-devdeps-parallel
+        - linux: py314-devdeps-parallel
 
   package:
     needs: [core]

pyproject.toml

@@ -4,7 +4,7 @@ description = "Asdf extension to support Zarr arrays"
 readme = 'README.rst'
 license-files = ['LICENSE']
 authors = [{ name = 'The ASDF Developers' }]
-requires-python = '>=3.9'
+requires-python = '>=3.10'
 classifiers = [
   'Development Status :: 5 - Production/Stable',
   'Programming Language :: Python',