chore: remove PHP 5 from README

README.md

@@ -1,6 +1,6 @@
 # Guzzle OAuth 2.0 Subscriber
 
-> Tested with Guzzle 4, 5, 6, 7 and PHP 5.4, 5.5, 5.6, 7.0, 7.1, 7.2, 7.3, 7.4, 8.0 and 8.1.
+> Tested with Guzzle 4, 5, 6, 7 and PHP 7.1, 7.2, 7.3, 7.4, 8.0 and 8.1.
 
 This is an OAuth 2.0 client for Guzzle which aims to be 100% compatible with Guzzle 4, 5, 6, 7 and all future versions within a single package.
 Although I love Guzzle, its interfaces keep changing, causing massive breaking changes every 12 months or so, so I have created this package
@@ -24,7 +24,7 @@ This project can be installed using Composer. Run `composer require kamermans/gu
 ```javascript
     {
         "require": {
-            "kamermans/guzzle-oauth2-subscriber": "~1.0"
+            "kamermans/guzzle-oauth2-subscriber": "~1.1"
         }
     }
 ```