CI: Update workflows (#46)

Test
* Drop Python 3.9
* Add Python 3.14
* Update macOS runners
* Update actions

Lint
* Drop Python 2.7
* Update Python 3.13 -> 3.14
* Update actions

Author: un-def

.github/workflows/lint.yml

@@ -12,18 +12,11 @@ on:
 jobs:
   lint:
     runs-on: ubuntu-24.04
-    strategy:
-      matrix:
-        python-version:
-          - '2.7'
-          - '3.13'
     steps:
-      - uses: actions/checkout@v4
-      - uses: MatteoH2O1999/setup-python@v3
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
         with:
-          python-version: ${{ matrix.python-version }}
-          allow-build: info
-          cache-build: true
+          python-version: '3.14'
       - name: Install linters
         run: |
           pip install isort flake8

.github/workflows/test.yml

@@ -15,24 +15,22 @@ jobs:
     strategy:
       matrix:
         include:
-          # macOS (13 ­­-- Intel, 14 -- ARM)
-          - os: macos-13
-            python-version: '3.9'
-            setup-python: true
-          - os: macos-13
+          # macOS (14 -- ARM, 15 -- Intel, 26 -- ARM)
+          - os: macos-14
             python-version: '3.10'
             setup-python: true
-          - os: macos-13
+          - os: macos-14
             python-version: '3.11'
             setup-python: true
-          - os: macos-14
+          - os: macos-15-intel
             python-version: '3.12'
             setup-python: true
-          - os: macos-14
+          - os: macos-15-intel
             python-version: '3.13'
+            setup-python: true
+          - os: macos-26
+            python-version: '3.14'
           # Windows
-          - os: windows-2022
-            python-version: '3.9'
           - os: windows-2022
             python-version: '3.10'
             setup-python: true
@@ -45,10 +43,10 @@ jobs:
           - os: windows-2022
             python-version: '3.13'
             setup-python: true
-          # Ubuntu
-          - os: ubuntu-22.04
-            python-version: '3.9'
+          - os: windows-2022
+            python-version: '3.14'
             setup-python: true
+          # Ubuntu
           - os: ubuntu-22.04
             python-version: '3.10'
           - os: ubuntu-22.04
@@ -59,17 +57,16 @@ jobs:
           - os: ubuntu-24.04
             python-version: '3.13'
             setup-python: true
+          - os: ubuntu-24.04
+            python-version: '3.14'
+            setup-python: true
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Setup Python
         if: ${{ matrix.setup-python }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Configure PATH to use preinstalled Python 2.7
-        if: ${{ startsWith(matrix.os, 'macos') && matrix.python-version == '2.7' }}
-        run: |
-          echo '/Library/Frameworks/Python.framework/Versions/2.7/bin' >> $GITHUB_PATH
       - name: Assert Python version
         run: |
           python -c 'import sys