update node versions in github action

Author: pdziewa

.github/workflows/ci.yml

@@ -9,15 +9,18 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [14.x, 16.x, 18.x, 19.x]
+        node-version: [16.x, 18.x, 19.x, 20.x]
 
     steps:
       - uses: actions/checkout@v2
+
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node-version }}
+
       - name: Install deps and build (with cache)
         uses: bahmutov/npm-install@v1
+
       - name: Test package
         run: yarn tsdx test