feat(build) use Node 20

.github/workflows/ci.yml

@@ -7,10 +7,15 @@ jobs:
     name: Build
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-node@v3
+    - uses: actions/checkout@v4
+    - uses: actions/setup-node@v4
       with:
-        node-version: 16
+        node-version-file: '.nvmrc'
+        cache: 'npm'
+    - name: Check Node / npm versions
+      run: |
+        node -v
+        npm -v
     - run: npm install
     - run: npm pack
     - name: Check git status

.nvmrc

@@ -0,0 +1 @@
+20