GHA: testing.

Author: agarny

.github/workflows/test.yml

@@ -16,6 +16,9 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '>=20.0.0'
       - run: |
           yarn
       - run: |