Update composer.json

Author: hivokas

composer.json

@@ -4,11 +4,11 @@
     "type": "library",
     "license": "MIT",
     "require": {
-        "php": "^7.2",
-        "laravel/framework": "5.8.*|^6.0|^7.0"
+        "php": "^7.3",
+        "laravel/framework": "^6.0|^7.0|^8.0"
     },
     "require-dev": {
-        "orchestra/testbench": "^3.8|^4.0|^5.0"
+        "orchestra/testbench": "^4.0|^5.0|^6.0"
     },
     "autoload": {
         "psr-4": {