chore: add tests for Node 20 (#440)

Author: MichaelDeBoey

.github/workflows/CI.yml renamed to .github/workflows/ci.yml

@@ -41,7 +41,7 @@ jobs:
     strategy:
       matrix:
         eslint: [8]
-        node: [12.22.0, 12, 14.17.0, 14, 16.0.0, 16, 18]
+        node: [12.22.0, 12, 14.17.0, 14, 16.0.0, 16, 18, 20]
         os: [ubuntu-latest]
         include:
           # On other platforms