Update github actions and dependencies

Author: veeck

.github/workflows/testing.yml

@@ -15,12 +15,12 @@ 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
+        uses: actions/checkout@v5
       - name: Setup Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node-version }}
       - name: Install dependencies and run tests