Try to fix Scrutinizer build

Author: ddeboer

composer.json

@@ -35,7 +35,7 @@
         "mockery/mockery": "~0.9.1",
         "monolog/monolog": "^1.0",
         "php-http/guzzle6-adapter": "^0.3.1",
-        "php-http/mock-client": "~0.1",
+        "php-http/mock-client": "~0.1.1",
         "symfony/process": "^2.3||^3.0",
         "symfony/http-kernel": "^2.3||^3.0"
     },