Add PHPUnit to require-dev

Author: clue

.travis.yml

@@ -1,9 +1,12 @@
 language: php
+
 php:
   - 5.3
   - 5.6
-  - hhvm
+# - hhvm
+
 install:
-  - composer install --prefer-source --no-interaction
+  - composer install --no-interaction
+
 script:
-  - phpunit --coverage-text
+  - vendor/bin/phpunit --coverage-text

README.md

@@ -20,6 +20,21 @@ The recommended way to install this library is [through composer](http://getcomp
 }
 ```
 
+## Tests
+
+To run the test suite, you first need to clone this repo and then install all
+dependencies [through Composer](http://getcomposer.org):
+
+```bash
+$ composer install
+```
+
+To run the test suite, go to the project root and run:
+
+```bash
+$ php vendor/bin/phpunit
+```
+
 ## License
 
 MIT

composer.json

@@ -18,5 +18,8 @@
         "react/event-loop": "~0.4.0|~0.3.0",
         "react/http": "~0.4.0|~0.3.0",
         "react/stream": "~0.4.0|~0.3.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^4.8"
     }
 }