Use >= operator instead of ^ operator for PHP version constraint

Author: sebastianbergmann

ChangeLog.md

@@ -2,6 +2,12 @@
 
 All notable changes are documented in this file using the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
+## [3.0.3] - 2020-11-30
+
+### Changed
+
+* Changed PHP version constraint in `composer.json` from `^7.1` to `>=7.1`
+
 ## [3.0.2] - 2019-02-04
 
 ### Changed
@@ -46,6 +52,7 @@ All notable changes are documented in this file using the [Keep a CHANGELOG](htt
 
 * This component is no longer supported on PHP 5.6
 
+[3.0.3]: https://github.com/sebastianbergmann/diff/compare/3.0.2...3.0.3
 [3.0.2]: https://github.com/sebastianbergmann/diff/compare/3.0.1...3.0.2
 [3.0.1]: https://github.com/sebastianbergmann/diff/compare/3.0.0...3.0.1
 [3.0.0]: https://github.com/sebastianbergmann/diff/compare/2.0...3.0.0

composer.json

@@ -15,7 +15,7 @@
         }
     ],
     "require": {
-        "php": "^7.1"
+        "php": ">=7.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^7.5 || ^8.0",