More specify composer

Author: snapshotpl

composer.json

@@ -2,7 +2,7 @@
     "name": "php-middleware/request-simulator",
     "require": {
         "php": ">=5.6",
-        "zendframework/zend-diactoros": "1.*"
+        "zendframework/zend-diactoros": "^1.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8.6"