Remove support for PHP 5.5 - closes #9

Author: xiehan

.travis.yml

@@ -1,7 +1,6 @@
 sudo: false
 language: php
 php:
-- '5.5'
 - '5.6'
 - '7.0'
 - '7.1'

README.md

@@ -51,7 +51,7 @@ This project is designed to be executed in a server environment with [Apache HTT
 
 ### Prerequisites
 
-A recent version of [PHP](http://php.net/), equal to or greater than 5.5.0 is required.
+A recent version of [PHP](http://php.net/), equal to or greater than 5.6.0 is required.
 
 The default [EncryptionProvider](/src/Providers/EncryptionProvider.php) class provided in this package relies on the [OpenSSL](http://php.net/manual/en/book.openssl.php) extension. If OpenSSL is unavailable, the consumer has the option to implement a custom EncryptionProvider class that implements our [EncryptionInterface](/src/Interfaces/EncryptionInterface.php). (For more information, see the [EncryptionProvider](#encryptionprovider) section.)
 

composer.json

@@ -1,7 +1,7 @@
 {
     "name": "npr/npr-one-backend-proxy",
     "description": "A server-side proxy for interacting with the NPR One API's authorization server",
-    "version": "1.1.2",
+    "version": "2.0.0",
     "keywords": [
         "npr",
         "oauth",
@@ -42,7 +42,7 @@
         }
     },
     "require": {
-        "php": ">=5.5.0",
+        "php": ">=5.6.0",
         "guzzlehttp/guzzle": "~6.0",
         "php-di/php-di": "^5.2"
     },