feat: v14 (#409)

BREAKING CHANGE: `onUnhandledRequest` middleware option is removed
BREAKING CHANGE: Drop support for NodeJS v14, v16
BREAKING CHANGE: Replace support for Node.js http(s) Agents with documentation on using fetch dispatchers instead (via `@octokit/request`)
BREAKING CHANGE: Remove ability to pass custom request options, except from `method`, `headers`, `body`, `signal` (via `@octokit/request`)

.github/workflows/test.yml

@@ -13,9 +13,8 @@ jobs:
     strategy:
       matrix:
         node_version:
-          - 14
-          - 16
           - 18
+          - 20
     steps:
       - uses: actions/checkout@v3
       - name: Use Node.js ${{ matrix.node_version }}

README.md

@@ -324,6 +324,7 @@ Middleware for Node's built in http server or [`express`](https://expressjs.com/
 
 ```js
 const { App, createNodeMiddleware } = require("@octokit/app");
+
 const app = new App({
   appId: 123,
   privateKey: "-----BEGIN PRIVATE KEY-----\n...",
@@ -337,11 +338,20 @@ const app = new App({
 });
 
 const middleware = createNodeMiddleware(app);
-
-require("http").createServer(middleware).listen(3000);
+require("http")
+  .createServer(async (req, res) => {
+    // `middleware` returns `false` when `req` is unhandled (beyond `/api/github`)
+    if (await middleware(req, res)) return;
+    res.writeHead(404);
+    res.end();
+  })
+  .listen(3000);
 // can now receive user authorization callbacks at /api/github/*
 ```
 
+The middleware returned from `createNodeMiddleware` can also serve as an
+`Express.js` middleware directly.
+
 <table width="100%">
   <thead align=left>
     <tr>
@@ -392,33 +402,9 @@ All exposed paths will be prefixed with the provided prefix. Defaults to `"/api/
 
 Used for internal logging. Defaults to [`console`](https://developer.mozilla.org/en-US/docs/Web/API/console) with `debug` and `info` doing nothing.
 
-</td>
+      </td>
     </tr>
-    <tr>
-      <th>
-        <code>options.onUnhandledRequest</code>
-      </th>
-      <th>
-        <code>function</code>
-      </th>
-      <td>
-
-Defaults to
 
-```js
-function onUnhandledRequest(request, response) {
-  response.writeHead(400, {
-    "content-type": "application/json",
-  });
-  response.end(
-    JSON.stringify({
-      error: error.message,
-    }),
-  );
-}
-```
-
-</td></tr>
   </tbody>
 </table>