Update the node version for github CI

Author: kuba-orlik

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20.x]
     steps:
       - uses: actions/checkout@v2
       - name: Running Node.js ${{ matrix.node-version }}