Update changelog

CHANGELOG.md

@@ -1,5 +1,26 @@
 # CHANGELOG
 
+## 6.3.0 - 2017-06-22
+
+* Feature: force IP resolution (ipv4 or ipv6) [#1608](https://github.com/guzzle/guzzle/pull/1608), [#1659](https://github.com/guzzle/guzzle/pull/1659)
+* Improvement: Don't include summary in exception message when body is empty [#1621](https://github.com/guzzle/guzzle/pull/1621)
+* Improvement: Handle `on_headers` option in MockHandler [#1580](https://github.com/guzzle/guzzle/pull/1580)
+* Improvement: Added SUSE Linux CA path [#1609](https://github.com/guzzle/guzzle/issues/1609)
+* Improvement: Use class reference for getting the name of the class instead of using hardcoded strings [#1641](https://github.com/guzzle/guzzle/pull/1641)
+* Feature: Added `read_timeout` option [#1611](https://github.com/guzzle/guzzle/pull/1611)
+* Bug fix: PHP 7.x fixes [#1685](https://github.com/guzzle/guzzle/pull/1685), [#1686](https://github.com/guzzle/guzzle/pull/1686), [#1811](https://github.com/guzzle/guzzle/pull/1811)
+* Deprecation: BadResponseException instantiation without a response [#1642](https://github.com/guzzle/guzzle/pull/1642)
+* Feature: Added NTLM auth [#1569](https://github.com/guzzle/guzzle/pull/1569)
+* Feature: Track redirect HTTP status codes [#1711](https://github.com/guzzle/guzzle/pull/1711)
+* Improvement: Check handler type during construction [#1745](https://github.com/guzzle/guzzle/pull/1745)
+* Improvement: Always include the Content-Length if there's a body [#1721](https://github.com/guzzle/guzzle/pull/1721)
+* Feature: Added convenience method to access a cookie by name [#1318](https://github.com/guzzle/guzzle/pull/1318)
+* Bug fix: Fill `CURLOPT_CAPATH` and `CURLOPT_CAINFO` properly [#1684](https://github.com/guzzle/guzzle/pull/1684)
+* Improvement:  	Use `\GuzzleHttp\Promise\rejection_for` function instead of object init [#1827](https://github.com/guzzle/guzzle/pull/1827)
+
+
++ Minor code cleanups, documentation fixes and clarifications.
+
 ## 6.2.3 - 2017-02-28
 
 * Fix deprecations with guzzle/psr7 version 1.4