Raise requirement for laravel dependencies

Author: dominikb

composer.json

@@ -17,13 +17,13 @@
     ],
     "require": {
         "php": "^7.1",
-        "illuminate/database": "~5.6.34|~5.7.0|~5.8.0|^6.0",
-        "illuminate/http": "~5.6.34|~5.7.0|~5.8.0|^6.0",
-        "illuminate/support": "~5.6.34|~5.7.0|~5.8.0|^6.0"
+        "illuminate/database": "~5.8.0|^6.0",
+        "illuminate/http": "~5.8.0|^6.0",
+        "illuminate/support": "~5.8.0|^6.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^7.0|^8.0",
-        "orchestra/testbench": "~3.6.0|~3.7.0|~3.8.0|^4.0",
+        "orchestra/testbench": "~3.8.0|^4.0",
         "ext-json": "*"
     },
     "autoload": {