Drop support for Node 16, at least in testing. Test undder Node 22.

Author: joshwilsonvu

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: ["16", "18", "20"]
+        node: ["18", "20", "22"]
     steps:
       - uses: actions/checkout@v4
       - name: Setup pnpm