bump to node 12 for postgres test

Author: mtrezza

.github/workflows/ci.yml

@@ -204,7 +204,7 @@ jobs:
       - name: Use Node.js 10
         uses: actions/setup-node@v1
         with:
-          node-version: 10
+          node-version: 12
       - name: Cache Node.js modules
         uses: actions/cache@v2
         with: