Python 3.14, drop Python 3.9

Closes #2506

.github/workflows/deploy-branch-preview.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python 3.11
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v6
       with:
         python-version: "3.11"
     - name: Install dependencies

.github/workflows/deploy-latest.yml

@@ -16,10 +16,10 @@ jobs:
     - name: Check out datasette
       uses: actions/checkout@v3
     - name: Set up Python
-      uses: actions/setup-python@v4
-      # gcloud commmand breaks on higher Python versions, so stick with 3.9:
+      uses: actions/setup-python@v6
+      # Using Python 3.10 for gcloud compatibility:
       with:
-        python-version: "3.9"
+        python-version: "3.10"
     - uses: actions/cache@v4
       name: Configure pip caching
       with:

.github/workflows/publish.yml

@@ -12,11 +12,11 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
         cache: pip
@@ -37,7 +37,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: '3.13'
         cache: pip
@@ -58,9 +58,9 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
-        python-version: '3.9'
+        python-version: '3.10'
         cache: pip
         cache-dependency-path: setup.py
     - name: Install dependencies

.github/workflows/spellcheck.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v6
       with:
         python-version: '3.11'
         cache: 'pip'

.github/workflows/test-coverage.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Check out datasette
       uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: '3.12'
         cache: 'pip'

.github/workflows/test-pyodide.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python 3.10
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: "3.10"
         cache: 'pip'

.github/workflows/test-sqlite-support.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         sqlite-version: [
           #"3", # latest version
           "3.46",
@@ -27,7 +27,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
         allow-prereleases: true

.github/workflows/test.yml

@@ -10,11 +10,11 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
         allow-prereleases: true
@@ -33,16 +33,13 @@ jobs:
         pytest -m "serial"
         # And the test that exceeds a localhost HTTPS server
         tests/test_datasette_https_server.sh
-    - name: Install docs dependencies on Python 3.9+
-      if: matrix.python-version != '3.8'
+    - name: Install docs dependencies
       run: |
         pip install -e '.[docs]'
     - name: Check if cog needs to be run
-      if: matrix.python-version != '3.8'
       run: |
         cog --check docs/*.rst
     - name: Check if blacken-docs needs to be run
-      if: matrix.python-version != '3.8'
       run: |
         # This fails on syntax errors, or a diff was applied
         blacken-docs -l 60 docs/*.rst