Test older Node.js compatibility

.github/workflows/nodejs.yml

@@ -36,8 +36,11 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 22.x]
-        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+        node-version: [12.x, 22.x]
+        # See Node.js upstream release schedule https://nodejs.org/en/about/releases/
+        # Support oldest Node.js version that works with our tests.
+        # Update package.json accordingly and with https://nodered.org/docs/faq/node-versions
+        # When moving to 16+, remove .npmrc
 
     steps:
     - uses: actions/checkout@v7
@@ -48,4 +51,4 @@ jobs:
         cache: 'npm'
     - run: npm ci
     - run: npm run build --if-present
-    - run: npm run test-only
+    - run: npm run test:only

.npmrc

@@ -0,0 +1 @@
+lockfile-version=2