Fatal Compile Error: Declaration of Http\Client\Socket\Stream::close() must be compatible

```
Fatal Compile Error: Declaration of Http\Client\Socket\Stream::close()
must be compatible with Psr\Http\Message\StreamInterface::close(): void
```

```
$ composer show php-http/socket-client | grep version
versions : * 2.1.1
$ composer show psr/http-message | grep version
versions : * 2.0
```