test: remove 16.x and add 20.x to CI

Author: rvagg

.github/workflows/test-and-release.yml

@@ -5,7 +5,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [16.x, 18.x, lts/*, current]
+        node: [18.x, 20.x, lts/*, current]
         os: [macos-latest, ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps: