fix dependencies

Author: dbu

composer.json

@@ -16,14 +16,13 @@
         "php-http/discovery": "^0.6.3",
         "php-http/client-implementation": "^1.0",
         "php-http/message-factory": "^1.0",
-        "php-http/plugins": "dev-master",
+        "php-http/plugins": "^0.2.0",
         "symfony/framework-bundle": "^2.7|^3.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.4",
         "php-http/guzzle6-adapter": "^0.3.1",
         "php-http/message": "^0.2.1",
-        "php-http/client-common": "^0.1.1",
         "symfony/symfony": "^2.7|^3.0",
         "polishsymfonycommunity/symfony-mocker-container": "~1.0",
         "matthiasnoback/symfony-dependency-injection-test": "^0.7"