updated CHANGELOG and version bumped to 0.8.3

Author: vimishor

CHANGELOG.md

@@ -2,6 +2,12 @@
 All notable changes to this project will be documented in this file.  
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## 0.8.3 / 2017-05-15
+
+### Fixed:
+  - Client::setApiVersion should accept only argument of type string (issue #57)
+
+
 ## 0.8.2 / 2017-01-10
 
 ### Fixed:

lib/Bitbucket/API/Http/Client.php

@@ -33,7 +33,7 @@ class Client extends ClientListener implements ClientInterface
         'api_versions'  => array('1.0', '2.0'),     // supported versions
         'format'        => 'json',
         'formats'       => array('json', 'xml'),    // supported response formats
-        'user_agent'    => 'bitbucket-api-php/0.8.2 (https://bitbucket.org/gentlero/bitbucket-api)',
+        'user_agent'    => 'bitbucket-api-php/0.8.3 (https://bitbucket.org/gentlero/bitbucket-api)',
         'timeout'       => 10,
         'verify_peer'   => false
     );