Prepare v0.5.2 release

Author: clue

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Changelog
 
+## 0.5.2 (2018-01-18)
+
+*   Feature: Detect "exit" immediately if last process pipe is closed
+    (#58 by @clue)
+
+    This introduces a simple check to see if the program is already known to be
+    closed when the last process pipe is closed instead of relying on a periodic
+    timer. This simple change improves "exit" detection significantly for most
+    programs and does not cause a noticeable penalty for more advanced use cases.
+
+*   Fix forward compatibility with upcoming EventLoop releases
+    (#56 by @clue)
+
 ## 0.5.1 (2017-12-22)
 
 *   Fix: Update Stream dependency to work around SEGFAULT in legacy PHP < 5.4.28

README.md

@@ -325,11 +325,17 @@ The recommended way to install this library is [through Composer](https://getcom
 This will install the latest supported version:
 
 ```bash
-$ composer require react/child-process:^0.5.1
+$ composer require react/child-process:^0.5.2
 ```
 
 See also the [CHANGELOG](CHANGELOG.md) for details about version upgrades.
 
+This project aims to run on any platform and thus does not require any PHP
+extensions and supports running on legacy PHP 5.3 through current PHP 7+ and HHVM.
+It's *highly recommended to use PHP 7+* for this project.
+
+See above note for limited [Windows Compatibility](#windows-compatibility).
+
 ## Tests
 
 To run the test suite, you first need to clone this repo and then install all