Update PHP version to 8.0

Author: K-Adam

.github/workflows/phpunit.yml

@@ -13,10 +13,7 @@ jobs:
     - name: Setup PHP
       uses: shivammathur/setup-php@v2
       with:
-        php-version: '7.2'
-        
-    - name: Validate composer.json and composer.lock
-      run: composer validate
+        php-version: '8.0'
 
     - name: Install dependencies
       run: composer install --prefer-dist --no-progress --no-suggest

.gitignore

@@ -1,5 +1,7 @@
 /vendor
+composer.lock
 
+.idea
 *.bak
 
 .phpunit.result.cache

composer.json

@@ -23,12 +23,12 @@
         }
     },
     "require": {
-        "php": "^7.2"
+        "php": ">=8.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.5"
+        "phpunit/phpunit": "9.5"
     },
     "scripts": {
         "test": "phpunit"
     }
-}
+}