Update README

README.md

@@ -29,8 +29,10 @@ composer require brick/phonenumber
 ## Requirements
 
 This library requires PHP 7.4 or later.
+
 For PHP 7.1 support, use version `0.4`.
 For PHP 5.6 and PHP 7.0 support, use version `0.1`.
+Note that [these PHP versions are EOL](http://php.net/supported-versions.php) and not supported anymore. If you're still using one of these PHP versions, you should consider upgrading as soon as possible.
 
 ## Project status & release process
 
@@ -40,7 +42,7 @@ The current releases are numbered `0.x.y`. When a non-breaking change is introdu
 
 **When a breaking change is introduced, a new `0.x` version cycle is always started.**
 
-It is therefore safe to lock your project to a given release cycle, such as `0.4.*`.
+It is therefore safe to lock your project to a given release cycle, such as `0.5.*`.
 
 If you need to upgrade to a newer release cycle, check the [release history](https://github.com/brick/phonenumber/releases) for a list of changes introduced by each further `0.x.0` version.