drop support for PHP 7.1 as it is no longer supported

Author: mhujer

.travis.yml

@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 7.1
   - 7.2
   - 7.3
 

README.md

@@ -50,7 +50,7 @@ class User
 
 Requirements
 ------------
-Works with PHP 7.1 or higher.
+Works with PHP 7.2 or higher.
 
 Submitting bugs and feature requests
 ------------------------------------
@@ -65,6 +65,9 @@ Thanks [Vašek Purchart](http://www.vasekpurchart.cz/) for ideas how to test Sym
 Changelog
 ----------
 
+## 4.0.0 (2018-XX-XX)
+- [#6](../../pull/6) dropped support for PHP 7.1 as it is no longer supported
+
 ## 3.0.0 (2018-01-07)
 - [#3](https://github.com/mhujer/jms-serializer-uuid-bundle/pull/3) Added Symfony 4.0 support, dropped support for Symfony 2. Requires PHP 7.1.
 

composer.json

@@ -18,7 +18,7 @@
 		}
 	],
 	"require": {
-		"php": "^7.1",
+		"php": "~7.2",
 		"jms/serializer-bundle": "~1.0 || ~2.0",
 		"mhujer/jms-serializer-uuid": "~2.0",
 		"symfony/config": "~3.0 || ~4.0",