Release 5.0.3

Release 0.0.0-test1

SDK regeneration (#397)

Co-authored-by: fern-api[bot] <115122769+fern-api[bot]@users.noreply.github.com>

Update README.md (#379)

SDK regeneration (#378)

Co-authored-by: fern-api <115122769+fern-api[bot]@users.noreply.github.com>

Make `IntercomClient::$password` explicitly nullable (#373)

This prevents a deprecation warning from showing up since PHP 8.4

```
Deprecated: Intercom\IntercomClient::__construct(): Implicitly marking parameter $password as nullable is deprecated, the explicit nullable type must be used instead in /<redacted-path>/vendor/intercom/intercom-php/src/IntercomClient.php on line 148
```

Http: add support for PSR17/PSR18 and drop usage of deprecated client…

… discovery (#363)

Merge pull request #342 from intercom/jn/update-readme

update readme

Merge pull request #342 from intercom/jn/update-readme

update readme

Fix bug where handleResponse() is called twice (#318)

You'll probably want better tests here....