Update CI Node versions to 18/16/14 (#1871)

Author: jathak

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ env:
   # Note: when changing this, also change
   # jobs.node_tests.strategy.matrix.node_version and the Node version for Dart
   # dev tests.
-  DEFAULT_NODE_VERSION: 16
+  DEFAULT_NODE_VERSION: 18
 
 on:
   push:
@@ -60,18 +60,18 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
         dart_channel: [stable]
-        node_version: [16]
+        node_version: [18]
         include:
           # Include LTS versions on Ubuntu
           - os: ubuntu-latest
             dart_channel: stable
-            node_version: 14
+            node_version: 16
           - os: ubuntu-latest
             dart_channel: stable
-            node_version: 12
+            node_version: 14
           - os: ubuntu-latest
             dart_channel: dev
-            node_version: 16
+            node_version: 18
 
     steps:
       - uses: actions/checkout@v3
@@ -138,18 +138,18 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
         dart_channel: [stable]
-        node_version: [16]
+        node_version: [18]
         include:
           # Include LTS versions on Ubuntu
           - os: ubuntu-latest
             dart_channel: stable
-            node_version: 14
+            node_version: 16
           - os: ubuntu-latest
             dart_channel: stable
-            node_version: 12
+            node_version: 14
           - os: ubuntu-latest
             dart_channel: dev
-            node_version: 16
+            node_version: 18
 
     steps:
       - uses: actions/checkout@v3