Switch back to ^8.0 in the PHP version requirement for 3.9.x

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+
+## 3.9.6 - 2021-09-25
+
+### Fixed
+
+* Switch back to `^8.0` in the PHP version requirement.
+
+
 ## 3.9.5 - 2021-09-24
 
 ### Fixed
@@ -12,6 +20,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 * Indicate support for PHP 8.1, using `~8.1.0` to prevent installations on 8.2
   until the library is ready.
 
+
 ## 3.9.4 - 2021-08-06
 
 ### Fixed

composer.json

@@ -21,7 +21,7 @@
         }
     ],
     "require": {
-        "php": "^5.4 | ^7 | ~8.0.0 | ~8.1.0",
+        "php": "^5.4 | ^7.0 | ^8.0",
         "ext-json": "*",
         "paragonie/random_compat": "^1 | ^2 | ^9.99.99",
         "symfony/polyfill-ctype": "^1.8"