Update node.js on Travis CI from v8 to v18

PeterDaveHello · PeterDaveHello · commit 8157816e0c02 · 2023-08-11T02:04:56.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -31,7 +31,7 @@ jobs:
   - stage: Static tests
     language: node_js
     node_js:
-      - "8"
+      - "18"
     env:
       - task=editorconfig-check
     install:
