Allow PHP ^8 and PHPUnit ^9.4 (#91)

* Allow PHP ^8 and PHPUnit ^9.4

* Update composer.json

* Update composer.json

* Update composer.json

* Update composer.json

Co-authored-by: Max Leonov <[email protected]>

Author: Michael Wikberg

composer.json

@@ -21,13 +21,12 @@
         "source": "https://github.com/maxbanton/cwh"
     },
     "require": {
-        "php": "^7.2",
+        "php": "^7.2 || ^8",
         "monolog/monolog": "^2.0",
         "aws/aws-sdk-php": "^3.18"
     },
     "require-dev": {
-        "maxbanton/dd": "^2.0",
-        "phpunit/phpunit": "^8.5",
+        "phpunit/phpunit": "^8.5 || ^9.4",
         "squizlabs/php_codesniffer": "^3.5"
     },
     "suggest": {