remove node 19

Author: leibale

.github/workflows/tests.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: ['18', '19']
+        node-version: ['18', '20']
         redis-version: ['5', '6.0', '6.2', '7.0']
     steps:
       - uses: actions/checkout@v2.3.4