ci: upgrade actions off Node 20

Bump actions/checkout v4→v6, actions/setup-node v4→v6, actions/setup-python
v5→v6, actions/upload-artifact v4→v7, actions/download-artifact v4→v8 to
move all jobs onto Node 24 ahead of the June 2026 Node 20 sunset.

Bump pypa/cibuildwheel v2.21→v3.4 and drop the macos-13 (Intel) wheel from
the matrix — no longer worth building.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Peter Stenger

.github/workflows/ci.yml

@@ -38,7 +38,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-14]
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up tree-sitter
         uses: tree-sitter/setup-action/cli@v2
       - name: Run tests

.github/workflows/fuzz.yml

@@ -14,6 +14,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Run fuzzer
         uses: tree-sitter/fuzz-action@v4

.github/workflows/lint.yml

@@ -10,13 +10,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
           version: 10
       - name: Set up Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           cache: pnpm
           node-version: 22
@@ -29,13 +29,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
           version: 10
       - name: Set up Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           cache: pnpm
           node-version: 22

.github/workflows/lsp.yml

@@ -23,13 +23,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
           version: 10
       - name: Set up Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           cache: pnpm
           node-version: ${{ vars.NODE_VERSION }}

.github/workflows/publish-npm.yml

@@ -15,9 +15,9 @@ jobs:
       contents: read
       id-token: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 22
 

.github/workflows/publish-pypi.yml

@@ -17,13 +17,13 @@ jobs:
     if: github.event_name == 'workflow_dispatch' || startsWith(github.ref_name, 'v')
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.11"
       - run: pip install --upgrade build
       - run: python -m build --sdist
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: dist-sdist
           path: dist/*.tar.gz
@@ -40,14 +40,13 @@ jobs:
           - ubuntu-latest
           - ubuntu-24.04-arm
           - windows-latest
-          - macos-13       # x86_64
           - macos-14       # arm64
     steps:
-      - uses: actions/checkout@v4
-      - uses: pypa/cibuildwheel@v2.21
+      - uses: actions/checkout@v6
+      - uses: pypa/cibuildwheel@v3.4
         env:
           CIBW_ARCHS: native
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: dist-wheels-${{matrix.os}}
           path: wheelhouse/*.whl
@@ -63,7 +62,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           path: dist
           pattern: dist-*

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up tree-sitter
         uses: tree-sitter/setup-action/cli@v2
@@ -36,15 +36,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
           version: 10
 
       - name: Set up Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: '20'