Add http message and diactoros as deps

Author: Xerkus

composer.json

@@ -21,6 +21,7 @@
     "require": {
         "php": "^7.1",
         "container-interop/container-interop": "^1.2",
+        "psr/http-message": "^1.0",
         "zendframework/zend-http": "^2.6",
         "zendframework/zend-servicemanager": "^3.3",
         "zendframework/zend-stdlib": "^3.1"
@@ -29,6 +30,7 @@
         "phpstan/phpstan": "dev-master",
         "phpunit/phpunit": "^6.4.1",
         "zendframework/zend-coding-standard": "~1.0.0",
+        "zendframework/zend-diactoros": "^1.6",
         "zendframework/zend-i18n": "^2.7.4"
     },
     "suggest": {