npm install, update git workflow

Author: eebbi

.github/workflows/npm-check.yml

@@ -8,9 +8,9 @@ jobs:
         steps:
             -   uses: actions/checkout@v1
 
-            -   uses: actions/setup-node@v2
+            -   uses: actions/setup-node@v4
                 with:
-                    node-version: '14'
+                    node-version: '20'
                     cache: 'npm'
                     cache-dependency-path: '**/package-lock.json'