chore: drop support for php < 8.1

Those versions are unsupported for a while now, it simplifies the CI and the code evolution.

Author: shulard

.github/workflows/continuous-integration.yml

@@ -13,7 +13,7 @@ jobs:
       fail-fast: true
       matrix:
         operating-system: [ubuntu-latest, windows-latest, macOS-latest]
-        php-versions: ['7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
+        php-versions: ['8.1', '8.2', '8.3', '8.4']
         composer-versions: ['composer:v2']
         dependencies: ["lowest", "highest"]
 

composer.json

@@ -43,8 +43,8 @@
         "docs": "https://github.com/friends-of-phpspec/phpspec-code-coverage#phpspec-code-coverage"
     },
     "require": {
-        "php": ">= 7.3",
-        "phpspec/phpspec": "^6.0 || ^7.0 || ^8.0",
+        "php": ">= 8.1",
+        "phpspec/phpspec": "^7.0 || ^8.0",
         "phpunit/php-code-coverage": "^9.2 || ^10.0 || ^11.0",
         "phpunit/php-file-iterator": "^3.0 || ^4.0 || ^5.0"
     },