Update CI

Author: whizsid

.github/workflows/main.yml

@@ -31,7 +31,7 @@ jobs:
         uses: shivammathur/setup-php@2.11.0
         with:
           # Setup PHP version.
-          php-version: 7.2
+          php-version: 8.0
           tools: phpunit, psalm, composer
       - name: Install dependencies
         run: |

composer.json

@@ -27,7 +27,7 @@
         "guzzlehttp/guzzle":"<7.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.0",
+        "phpunit/phpunit": "^9.5",
         "vimeo/psalm": "4.x-dev"
     }
 }