Drop support for Node before v20

We continue testing in Node v18 which _should_ work for a while, but not
guarantees - only Node v20+ is now officially supported as v18 is now
end-of-life anyway.

Author: pimterry

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x, 20.x, 22.x, v22.14.0, 23.x]
+        node-version: [18.x, 20.x, 22.x, v22.14.0, 24.x]
 
     steps:
       - uses: actions/checkout@v4
@@ -23,12 +23,11 @@ jobs:
 
       - run: npm run ci-tests
         env:
-          # The new type stripping breaks our existing ts-node testing
-          # set up, so disable it:
-          NODE_OPTIONS: ${{ startsWith(matrix.node-version, '23') && '--no-experimental-strip-types' || '' }}
+          # The new type stripping breaks our existing ts-node testing set up, so disable it for Node 22+
+          NODE_OPTIONS: ${{ !startsWith(matrix.node-version, '20') && '--no-experimental-strip-types' || '' }}
 
       - name: Deploy docs
-        if: github.ref == 'refs/heads/main' && matrix.node-version == 'v20.18.1'
+        if: github.ref == 'refs/heads/main' && matrix.node-version == 'v22.14.0'
         uses: JamesIves/github-pages-deploy-action@v4
         with:
           single-commit: true

package.json

@@ -156,7 +156,7 @@
     "zstd-codec": "^0.1.4"
   },
   "engines": {
-    "node": ">=14.14.0"
+    "node": ">=20.0.0"
   },
   "dependencies": {
     "@graphql-tools/schema": "^8.5.0",

test/test-utils.ts

@@ -303,7 +303,7 @@ export const nodeSatisfies = (range: string) =>
 
 export const DETAILED_TLS_ERROR_CODES = ">=18";
 export const NATIVE_FETCH_SUPPORTED = ">=18";
-export const SOCKET_RESET_SUPPORTED = "^16.17 || >=18.3";
+export const SOCKET_RESET_SUPPORTED = ">=18.3";
 export const BROKEN_H1_OVER_H2_TUNNELLING = "^18.8";
 export const DEFAULT_KEEP_ALIVE = ">=19";
 export const FIXED_KEEP_ALIVE_BEHAVIOUR = ">=20";