Work around https-proxy-agent ALPN breakage in Node v20

Author: pimterry

package.json

@@ -163,7 +163,7 @@
   "dependencies": {
     "@graphql-tools/schema": "^8.5.0",
     "@graphql-tools/utils": "^8.8.0",
-    "@httptoolkit/httpolyglot": "^2.1.0",
+    "@httptoolkit/httpolyglot": "^2.1.1",
     "@httptoolkit/subscriptions-transport-ws": "^0.11.2",
     "@httptoolkit/websocket-stream": "^6.0.1",
     "@types/cors": "^2.8.6",

src/server/http-combo-server.ts

@@ -153,11 +153,12 @@ export async function createComboServer(
             cert: defaultCert.cert,
             ca: [defaultCert.ca],
             ALPNProtocols: options.http2 === true
-                ? ['h2', 'http/1.1']
+                ? ['h2', 'http/1.1', 'http 1.1'] // 'http 1.1' is non-standard, but used by https-proxy-agent
                     : options.http2 === 'fallback'
-                ? ['http/1.1', 'h2']
+                ? ['http/1.1', 'http 1.1', 'h2']
                     // false
-                : ['http/1.1'],
+                : ['http/1.1', 'http 1.1'],
+
             SNICallback: (domain: string, cb: Function) => {
                 if (options.debug) console.log(`Generating certificate for ${domain}`);