Prepare v0.7.4 release

Author: WyriHaximus

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## 0.7.4 (2017-08-16)
+
+*   Improvement: Target evenement 3.0 a long side 2.0 and 1.0
+    (#212 by @WyriHaximus)
+
 ## 0.7.3 (2017-08-14)
 
 *   Feature: Support `Throwable` when setting previous exception from server callback

README.md

@@ -659,7 +659,7 @@ The recommended way to install this library is [through Composer](http://getcomp
 This will install the latest supported version:
 
 ```bash
-$ composer require react/http:^0.7.3
+$ composer require react/http:^0.7.4
 ```
 
 More details about version upgrades can be found in the [CHANGELOG](CHANGELOG.md).