* fixed php version dependency in composer

composer.json

@@ -5,7 +5,7 @@
     "homepage": "https://github.com/zendframework/zend-expressive-skeleton",
     "license": "BSD-3-Clause",
     "require": {
-        "php": "^5.6 || ^7.0",
+        "php": "^7.1",
         "roave/security-advisories": "dev-master",
         "zendframework/zend-expressive": "^1.0",
         "zendframework/zend-expressive-helpers": "^2.0",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "b1e57ae7cfe0a0ae89d7c6e2e99be10b",
+    "content-hash": "1823e15d3da7740350f42c474e6e640e",
     "packages": [
         {
             "name": "container-interop/container-interop",
@@ -3632,7 +3632,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^5.6 || ^7.0"
+        "php": "^7.1"
     },
     "platform-dev": []
 }