dropping node v14 support

On v14, node does not seem to support npm access to Github via Github Actions -- or, at least not easily.

This can be reverted once we target a particular alpha of graphql that is published to npm.

See: actions/setup-node#214

.github/workflows/ci.yml

@@ -99,7 +99,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node_version_to_setup: [14, 16, 18]
+        node_version_to_setup: [16, 18]
     permissions:
       contents: read # for actions/checkout
     steps: