This upgrades prettier to 2.2.0 to gain support for TypeScript's new
type-only-imports feature.

Includes socketio/socket.io-client@b3de861

Related: #3720

This functionality was removed in [1] (included in 3.0.0), but
catch-all listeners and socket middleware features are complementary
rather than mutually exclusive.

The only difference with the previous implementation is that passing an
error to the `next` handler will create an error on the server-side,
and not on the client-side anymore.

```js
io.on("connection", (socket) => {

  socket.use(([ event, ...args ], next) => {
    next(new Error("stop"));
  });

  socket.on("error", (err) => {
    // to restore the previous behavior
    socket.emit("error", err);

    // or close the connection, depending on your use case
    socket.disconnect(true);
  });
});
```

This creates additional possibilities about custom error handlers, which
may be implemented in the future.

```js
// user-defined error handler
socket.use((err, [ event ], next) => {
  // either handle it
  socket.disconnect();

  // or forward the error to the default error handler
  next(err);
});

// default error handler
socket.use((err, _, next) => {
  socket.emit("error", err);
});
```

Related: #3678

[1]: 5c73733

Diff: 3.0.4...3.0.5