Requirements updated.

Author: mekras

composer.json

@@ -22,7 +22,9 @@
         "guzzlehttp/psr7": "^1.0",
         "php-http/adapter-integration-tests": "dev-master#836cdff8294174cceeae54601ab4079c309227b7",
         "php-http/message": "^1.0",
+        "php-http/discovery": "~0.8.0",
         "phpunit/phpunit": "^4.8",
+        "puli/composer-plugin": "^1.0",
         "zendframework/zend-diactoros": "^1.0"
     },
     "autoload": {