upgrade to 6.0

Author: EcoinTest

composer.json

@@ -11,13 +11,13 @@
     ],
     "minimum-stability": "dev",
     "require": {
-        "php" : "^7.1",
-        "illuminate/database": "~5.5.0|~5.6.0|~5.7.0|~5.8.0",
-        "illuminate/support": "~5.5.0|~5.6.0|~5.7.0|~5.8.0"
+        "php" : "^7.2",
+        "illuminate/database": "~5.5.0|~5.6.0|~5.7.0|~5.8.0|~6.0.0",
+        "illuminate/support": "~5.5.0|~5.6.0|~5.7.0|~5.8.0|~6.0.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.3|^7.0",
-        "orchestra/testbench": "~3.5.0|~3.6.0"
+        "phpunit/phpunit": "^6.3|^7.0|^8.0",
+        "orchestra/testbench": "~3.5.0|~3.6.0|^4.0"
     },
     "autoload": {
         "psr-4": {