Update to Laravel 9 (#54)

Author: sschlein

composer.json

@@ -21,13 +21,13 @@
     },
     "minimum-stability": "dev",
     "require": {
-        "illuminate/database": "^8.0||^7.0||^6.0||4.1 - 6.0"
+        "illuminate/database": "^9.0||^8.0||^7.0||^6.0||4.1 - 6.0"
     },
     "suggest": {
         "jenssegers/mongodb": "Use QueryBuilderParser with MongoDB"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.5||^7.0",
+        "phpunit/phpunit": "^9.5||^8.5||^7.0",
         "mockery/mockery": "^1.3.1||^0.9.4"
     }
 }