Merge pull request #1284 from AtCoder-NoviSteps/#258

🔧 Add Node.js v20 to CI (#258)

Author: KATO-Hiro

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [18.x, 20.x]
 
     steps:
       - name: Check out Git repository