ci: use node 16

Author: pmb0

.github/workflows/nodejs.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v1
         with:
-          node-version: "18.x"
+          node-version: "16.x"
 
       - name: Install dependencies
         run: yarn --frozen-lockfile

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v1
         with:
-          node-version: 18
+          node-version: 16
 
       - name: Install dependencies
         run: yarn --frozen-lockfile