In order to test 50671d9

[skip ci]

This includes `[email protected]`, which fixes two issues with
React Native.

See also:

- socketio/engine.io-client@177b95f
- socketio/engine.io-client@ccb99e3

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Those types are mandatory for TypeScript users.

Related:

- #3690
- microsoft/types-publisher#81 (comment)

So that the following example:

```js
const io = require('socket.io')({
  pingTimeout: 10000
});

io.listen(3000);
```

behaves the same as:

```js
const io = require('socket.io')(3000, {
  pingTimeout: 10000
});
```

Before this change, the options in the first example were not forwarded
to the Engine.IO constructor, which is not really intuitive.

The previous syntax (which is still valid):

```js
const io = require('socket.io')();

io.listen(3000, {
  pingTimeout: 10000
});
```

Diff: 3.0.1...3.0.2