Add typehint to ApiResponse

[baijunyao]

stripe-php/lib/ApiRequestor.php

Lines 124 to 127 in c06eb0d

	list($rbody, $rcode, $rheaders, $myApiKey) =
	$this->_requestRaw($method, $url, $params, $headers);
	$json = $this->_interpretResponse($rbody, $rcode, $rheaders);
	$resp = new ApiResponse($rbody, $rcode, $rheaders, $json);

stripe-php/lib/HttpClient/CurlClient.php

Line 214 in c06eb0d

$rheaders = new Util\CaseInsensitiveArray();

[ob-stripe]

Thanks for the contribution!

[ob-stripe]

Released as 6.43.1.