add node 20 to matrix

Author: searls

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [16.x, 18.x, 20.x]
         os: [ubuntu-latest, windows-latest]
 
     runs-on: ${{ matrix.os }}