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

ChangeLog.md

@@ -2,6 +2,12 @@
 
 All notable changes are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
 
+## [2.0.2] - 2020-11-30
+
+### Changed
+
+* Changed PHP version constraint in `composer.json` from `^7.1` to `>=7.1`
+
 ## [2.0.1] - 2018-10-04
 
 ### Fixed
@@ -22,5 +28,6 @@ All notable changes are documented in this file using the [Keep a CHANGELOG](htt
 
 * Initial release
 
+[2.0.2]: https://github.com/sebastianbergmann/comparator/compare/2.0.1...2.0.2
 [2.0.1]: https://github.com/sebastianbergmann/comparator/compare/2.0.0...2.0.1
 [2.0.0]: https://github.com/sebastianbergmann/comparator/compare/1.0.0...2.0.0

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": "^7.1"
+        "php": ">=7.1"
     },
     "autoload": {
         "classmap": [