Update composer.json

Author: mpociot

composer.json

@@ -17,14 +17,14 @@
     ],
     "require": {
         "php": "^7.1",
-        "illuminate/auth": "5.5.*|5.6.*|5.7.*|5.8.*",
-        "illuminate/database": "5.5.*|5.6.*|5.7.*|5.8.*",
-        "illuminate/notifications": "5.5.*|5.6.*|5.7.*|5.8.*",
-        "illuminate/support": "5.5.*|5.6.*|5.7.*|5.8.*"
+        "illuminate/auth": "5.5.*|5.6.*|5.7.*|5.8.*|^6.0",
+        "illuminate/database": "5.5.*|5.6.*|5.7.*|5.8.*|^6.0",
+        "illuminate/notifications": "5.5.*|5.6.*|5.7.*|5.8.*|^6.0",
+        "illuminate/support": "5.5.*|5.6.*|5.7.*|5.8.*|^6.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^7.0",
-        "orchestra/testbench": "~3.5.0|~3.6.0|~3.7.0|~3.8.0"
+        "orchestra/testbench": "~3.5.0|~3.6.0|~3.7.0|~3.8.0|^4.0"
     },
     "autoload": {
         "psr-4": {