Update readme

Author: zachborboa

README.md

@@ -200,6 +200,7 @@ More examples are available under [/examples](https://github.com/php-curl-class/
 Curl::__construct($base_url = null, $options = [])
 Curl::__destruct()
 Curl::__get($name)
+Curl::__isset($name)
 Curl::afterSend($callback)
 Curl::attemptRetry()
 Curl::beforeSend($callback)
@@ -279,29 +280,37 @@ Curl::setDefaultJsonDecoder()
 Curl::setDefaultTimeout()
 Curl::setDefaultUserAgent()
 Curl::setDefaultXmlDecoder()
+Curl::setDelete($url, $query_parameters = [], $data = [])
 Curl::setDigestAuthentication($username, $password = '')
 Curl::setFile($file)
 Curl::setFollowLocation($follow_location = true)
 Curl::setForbidReuse($forbid_reuse = true)
+Curl::setGet($url, $data = [])
+Curl::setHead($url, $data = [])
 Curl::setHeader($key, $value)
 Curl::setHeaders($headers)
 Curl::setInterface($interface)
 Curl::setJsonDecoder($mixed)
 Curl::setMaxFilesize($bytes)
 Curl::setMaximumRedirects($maximum_redirects)
 Curl::setOpt($option, $value)
+Curl::setOptions($url, $data = [])
 Curl::setOpts($options)
+Curl::setPatch($url, $data = [])
 Curl::setPort($port)
+Curl::setPost($url, $data = '', $follow_303_with_post = false)
 Curl::setProtocols($protocols)
 Curl::setProxy($proxy, $port = null, $username = null, $password = null)
 Curl::setProxyAuth($auth)
 Curl::setProxyTunnel($tunnel = true)
 Curl::setProxyType($type)
+Curl::setPut($url, $data = [])
 Curl::setRange($range)
 Curl::setRedirectProtocols($redirect_protocols)
 Curl::setReferer($referer)
 Curl::setReferrer($referrer)
 Curl::setRetry($mixed)
+Curl::setSearch($url, $data = [])
 Curl::setStop($callback = null)
 Curl::setTimeout($seconds)
 Curl::setUrl($url, $mixed_data = '')