run tests in Node.js v20

Author: christian-bromann

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [16.x, 18.x, 20.x]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1