chore: upgrade actions to a version that use node20 (LTS) (#535)

* chore: upgrade actions to a version that use node20 (LTS)

* chore: update tests to run on node20

Author: r4mmer

.github/workflows/main.yml

@@ -18,11 +18,11 @@ jobs:
     timeout-minutes: 40  # default is 360
     strategy:
       matrix:
-        node-version: [14.x, 16.x]
+        node-version: [20.x]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node-version }}
     - name: Install dependencies