fixed: remove deprecated node version from the CI config

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x, 19.x]
+        node-version: [18.x, 20.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
     steps:
       - uses: actions/checkout@v2
@@ -23,10 +23,10 @@ jobs:
       - run: npm i
       - run: npm test
       - name: Generate Coverage
-        if: ${{ success() && github.event_name != 'pull_request' && matrix.node-version == '18.x' }}
+        if: ${{ success() && github.event_name != 'pull_request' && matrix.node-version == '20.x' }}
         run: npm run cov
       - name: Coveralls
-        if: ${{ success() && github.event_name != 'pull_request' && matrix.node-version == '18.x' }}
+        if: ${{ success() && github.event_name != 'pull_request' && matrix.node-version == '20.x' }}
         uses: coverallsapp/github-action@master
         with:
           path-to-lcov: ./coverage/lcov.info