Prepare v0.5.2 release

Author: clue

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.5.2 (2017-06-27)
+
+*   Feature: Support passing arrays for request header values
+    (#100 by @clue)
+
+*   Fix: Fix merging default headers if overwritten with custom case headers
+    (#101 by @clue)
+
 ## 0.5.1 (2017-06-18)
 
 *   Feature: Emit `error` event if request URL is invalid

README.md

@@ -106,7 +106,7 @@ The recommended way to install this library is [through Composer](http://getcomp
 This will install the latest supported version:
 
 ```bash
-$ composer require react/http-client:^0.5.1
+$ composer require react/http-client:^0.5.2
 ```
 
 More details about version upgrades can be found in the [CHANGELOG](CHANGELOG.md).