php version updated to 7.1

Author: s3b4stian

README.md

@@ -11,7 +11,7 @@
 This package provide typed arrays for php as extension of native [ArrayObject](http://php.net/manual/en/class.arrayobject.php).  
 
 ## Requirements
-This package require php 7.
+This package require php 7.1
 
 ## Installation
 With composer:

composer.json

@@ -15,7 +15,7 @@
         "issues": "https://github.com/linna/typed-array/issues"
     },
     "require": {
-        "php": "^7.0"
+        "php": "^7.1"
     },
     "require-dev": {
         "infection/infection": "^0.10",