drop support for PHP versions < 8.0

Author: wol-soft

.github/workflows/main.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+        php: ['8.0', '8.1', '8.2']
 
     name: PHP ${{ matrix.php }} tests
     steps:

README.md

@@ -1,5 +1,5 @@
 [![Latest Version](https://img.shields.io/packagist/v/wol-soft/php-json-schema-model-generator.svg)](https://packagist.org/packages/wol-soft/php-json-schema-model-generator)
-[![Minimum PHP Version](https://img.shields.io/badge/php-%3E%3D%207.2-8892BF.svg)](https://php.net/)
+[![Minimum PHP Version](https://img.shields.io/badge/php-%3E%3D%208.0-8892BF.svg)](https://php.net/)
 [![Maintainability](https://api.codeclimate.com/v1/badges/7eb29e7366dc3d6a5f44/maintainability)](https://codeclimate.com/github/wol-soft/php-json-schema-model-generator/maintainability)
 [![Build Status](https://github.com/wol-soft/php-json-schema-model-generator/actions/workflows/main.yml/badge.svg)](https://github.com/wol-soft/php-json-schema-model-generator/actions/workflows/main.yml)
 [![Coverage Status](https://coveralls.io/repos/github/wol-soft/php-json-schema-model-generator/badge.svg?branch=master)](https://coveralls.io/github/wol-soft/php-json-schema-model-generator?branch=master)
@@ -27,7 +27,7 @@ Simple example from a PHP application: you define and document an API with swagg
 
 ## Requirements ##
 
-- Requires at least PHP 7.2
+- Requires at least PHP 8.0
 - Requires the PHP extensions ext-json and ext-mbstring
 
 ## Installation ##

composer.json

@@ -15,12 +15,12 @@
         "wol-soft/php-json-schema-model-generator-production": "^0.19.0",
         "wol-soft/php-micro-template": "^1.9.0",
 
-        "php": ">=7.2",
+        "php": ">=8.0",
         "ext-json": "*",
         "ext-mbstring": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.5 || ^9.4"
+        "phpunit/phpunit": "^9.4"
     },
     "autoload": {
         "psr-4": {