fix: update node version

Author: michalkotas

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [16, 18]
+        node: [18, 20]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3