Prepare version 6.5 (#2420)

* Prepare version 6.5

* Updated date

Author: Nyholm

CHANGELOG.md

@@ -1,5 +1,14 @@
 # Change Log
 
+## 6.5.0 - 2019-11-07
+
+* Improvement: Added support for reset internal queue in MockHandler. [#2143](https://github.com/guzzle/guzzle/pull/2143)
+* Improvement: Added support to pass arbitrary options to `curl_multi_init`. [#2287](https://github.com/guzzle/guzzle/pull/2287)
+* Fix: Gracefully handle passing `null` to the `header` option. [#2132](https://github.com/guzzle/guzzle/pull/2132)
+* Fix: `RetryMiddleware` did not do exponential delay between retires due unit mismatch. [#2132](https://github.com/guzzle/guzzle/pull/2132)
+* Fix: Prevent undefined offset when using array for ssl_key options. [#2348](https://github.com/guzzle/guzzle/pull/2348)
+* Deprecated `ClientInterface::VERSION`
+
 ## 6.4.1 - 2019-10-23
 
 * No `guzzle.phar` was created in 6.4.0 due expired API token. This release will fix that 

src/ClientInterface.php

@@ -15,7 +15,7 @@ interface ClientInterface
     /**
      * @deprecated Will be removed in Guzzle 7.0.0
      */
-    const VERSION = '6.4.1';
+    const VERSION = '6.5.0';
 
     /**
      * Send an HTTP request.