CI: bump actions/checkout to v4, drop Node 14.x

Author: kbdharun

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        node-version: [14.x, 16.x, 18.x]
+        node-version: [16.x, 18.x, 20.x]
 
     steps:
     - name: Cancel Previous Runs
@@ -22,7 +22,7 @@ jobs:
       with:
         access_token: ${{ github.token }}
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Cache node modules
       uses: actions/cache@v3