Add Python 3.14 support, drop Python 3.10 and below

- Update classifiers to 3.11-3.14, set python_requires >= 3.11
- Add Python 3.14 to CI test matrix (pr.yaml)
- Update all GitHub Actions to latest versions (checkout v4, setup-python v5, codecov v4)
- Update push.yaml to use Python 3.14
- Add .python-version for uv default
- Fix url in setup.py to point to policyengine-ng (not core)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: MaxGhenis

.github/workflows/pr.yaml

@@ -6,7 +6,7 @@ jobs:
   Lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Check formatting
         uses: "lgeiger/black-action@master"
         with:
@@ -15,15 +15,15 @@ jobs:
     name: Check version
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           ref: ${{ github.event.pull_request.head.ref }}
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.12
       - name: Build changelog
         run: pip install yaml-changelog>=0.1.7 && make changelog
       - name: Preview changelog update
@@ -35,18 +35,20 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
+        python-version: ["3.11", "3.12", "3.13", "3.14"]
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
       - name: Install package
         run: make install
       - name: Run tests
         run: make test
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
       - name: Build package
         run: make build
       - name: Test documentation builds

.github/workflows/push.yaml

@@ -9,7 +9,7 @@ jobs:
       (github.repository == 'PolicyEngine/policyengine-ng')
       && (github.event.head_commit.message == 'Update PolicyEngine Nigeria')
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Check formatting
         uses: "lgeiger/black-action@master"
         with:
@@ -22,15 +22,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           ref: ${{ github.event.pull_request.head.ref }}
           token: ${{ secrets.POLICYENGINE_GITHUB }}
       - name: Setup Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.14
       - name: Build changelog
         run: pip install yaml-changelog && make changelog
       - name: Preview changelog update
@@ -52,16 +52,16 @@ jobs:
         os: [ubuntu-latest, windows-latest]
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.14
       - name: Install package
         run: make install
       - name: Run tests
         run: make test
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
       - name: Generate documentation
         run: make documentation
       - name: Deploy documentation
@@ -78,11 +78,11 @@ jobs:
       && (github.event.head_commit.message == 'Update PolicyEngine Nigeria')
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.14
       - name: Publish a git tag
         run: ".github/publish-git-tag.sh || true"
       - name: Install package
@@ -104,15 +104,15 @@ jobs:
       GH_TOKEN: ${{ secrets.POLICYENGINE_GITHUB }}
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           ref: ${{ github.event.pull_request.head.ref }}
           token: ${{ secrets.POLICYENGINE_GITHUB }}
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.14
       - name: Install Wheel and Pytest
         run: pip3 install wheel setuptools pytest==5.4.3
       - name: Install package
@@ -121,4 +121,3 @@ jobs:
         run: python .github/update_api.py
         env:
           GITHUB_TOKEN: ${{ secrets.POLICYENGINE_GITHUB }}
-

.python-version

@@ -0,0 +1 @@
+3.14

changelog_entry.yaml

@@ -0,0 +1,4 @@
+- bump: minor
+  changes:
+    added:
+    - Python 3.14 support. Dropped Python 3.10 and below.

setup.py

@@ -41,16 +41,18 @@
         "License :: OSI Approved :: GNU Affero General Public License v3",
         "Operating System :: POSIX",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
         "Topic :: Scientific/Engineering :: Information Analysis",
     ],
+    python_requires=">=3.11",
     description="Core microsimulation engine enabling country-specific policy models.",
     keywords="tax benefit microsimulation framework",
     license="https://www.fsf.org/licensing/licenses/agpl-3.0.html",
     license_files=("LICENSE",),
-    url="https://github.com/policyengine/policyengine-core",
+    url="https://github.com/policyengine/policyengine-ng",
     long_description=long_description,
     long_description_content_type="text/markdown",
     entry_points={