External Libraries: Update Requests to 2.0.9.

This updates the Requests library from version `2.0.8` to `2.0.9`. This is a hotfix release.

Props jorbin, hellofromTonya, desrosj, barry, cenkdemir, nexflaszlo, schlessera, jrf, Clorith, tomsommer, azaozz, pbiron, afragen, howdy_mcgee.
Fixes #59842.
Built from https://develop.svn.wordpress.org/trunk@57086


git-svn-id: http://core.svn.wordpress.org/trunk@56597 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/Requests/src/Requests.php

@@ -148,7 +148,7 @@ class Requests {
 	 *
 	 * @var string
 	 */
-	const VERSION = '2.0.8';
+	const VERSION = '2.0.9';
 
 	/**
 	 * Selected transport name

wp-includes/Requests/src/Transport/Curl.php

@@ -25,7 +25,6 @@ use WpOrg\Requests\Utility\InputValidator;
 final class Curl implements Transport {
 	const CURL_7_10_5 = 0x070A05;
 	const CURL_7_16_2 = 0x071002;
-	const CURL_7_22_0 = 0x071600;
 
 	/**
 	 * Raw HTTP data
@@ -364,7 +363,7 @@ final class Curl implements Transport {
 		$options['hooks']->dispatch('curl.before_request', [&$this->handle]);
 
 		// Force closing the connection for old versions of cURL (<7.22).
-		if ($this->version < self::CURL_7_22_0 && !isset($headers['Connection'])) {
+		if (!isset($headers['Connection'])) {
 			$headers['Connection'] = 'close';
 		}