bump LTS version of node in CI

Author: pedep

.github/workflows/ci.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 env:
   FORCE_COLOR: true
-  NODE_VERSION: latest
+  NODE_VERSION: 20
 
 jobs:
   setup:
@@ -42,7 +42,7 @@ jobs:
 
     strategy:
       matrix:
-        node_version: [16, 18]
+        node_version: [18, 20]
 
     steps:
       - uses: actions/checkout@v3