MM² Main core use node >= v20 // delete node v18 from test suite (#3463)

#3462

.github/workflows/automated-tests.yaml

@@ -18,7 +18,7 @@ jobs:
     timeout-minutes: 30
     strategy:
       matrix:
-        node-version: [18.x, 20.x, 22.x]
+        node-version: [20.x, 22.x]
     steps:
       - name: "Checkout code"
         uses: actions/checkout@v4

.github/workflows/electronRebuild.yaml

@@ -6,9 +6,17 @@ jobs:
   rebuild:
     name: Run electron-rebuild
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [20.x, 22.x]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+      - name: "Use Node.js ${{ matrix.node-version }}"
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          check-latest: true
       - name: Install MagicMirror
         run: npm run install-mm
       - name: Install @electron/rebuild