ci: pin Node to 24 and install latest npm before any install/test step

Provenance generation needs an up-to-date npm; aligning on Node 24
matches the canonical CodeceptJS publish-beta workflow.

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

Author: DavertMik

.github/workflows/publish.yml

@@ -18,8 +18,9 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: 22
+          node-version: 24
 
+      - run: npm install -g npm@latest
       - run: npm install
       - run: npm test
 
@@ -33,11 +34,11 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: 22
+          node-version: 24
           registry-url: 'https://registry.npmjs.org'
 
-      - run: npm install
       - run: npm install -g npm@latest
+      - run: npm install
 
       - name: Set package version from release tag
         run: npm version "${{ github.event.release.tag_name }}" --no-git-tag-version

.github/workflows/run-tests.yml

@@ -18,13 +18,11 @@ jobs:
   unit-tests:
     name: Unit tests
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [20.x, 22.x]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: 24
+      - run: npm install -g npm@latest
       - run: npm install
       - run: npm test