update dependencies

Author: sschlein

composer.json

@@ -16,16 +16,16 @@
         }
     ],
     "require": {
-        "php": "^7.1",
-        "illuminate/auth": "^7.0",
-        "illuminate/database": "^7.0",
-        "illuminate/notifications": "^7.0",
-        "illuminate/support": "^7.0",
-        "laravel/ui": "^2.0"
+        "php": "^7.3",
+        "illuminate/auth": "^8.0",
+        "illuminate/database": "^8.0",
+        "illuminate/notifications": "^8.0",
+        "illuminate/support": "^8.0",
+        "laravel/ui": "^3.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.0",
-        "orchestra/testbench": "^5.0"
+        "phpunit/phpunit": "^9.0",
+        "orchestra/testbench": "^6.0"
     },
     "autoload": {
         "psr-4": {