Drop support for old Laravel versions

Author: rdgout

composer.json

@@ -12,16 +12,16 @@
     "license": "MIT",
     "authors": [],
     "require": {
-        "php": "^7.2.5",
-        "illuminate/console": "^6.0|^7.0|^8.0",
-        "illuminate/database": "^6.0|^7.0|^8.0",
-        "illuminate/support": "^6.0|^7.0|^8.0",
-        "illuminate/routing": "^6.0|^7.0|^8.0"
+        "php": "^7.4|^8.0",
+        "illuminate/console": "^8.0",
+        "illuminate/database": "^8.0",
+        "illuminate/support": "^8.0",
+        "illuminate/routing": "^8.0"
     },
     "require-dev": {
-        "phpunit/phpunit" : "^8.0",
+        "phpunit/phpunit": "^9.5",
         "mockery/mockery": "^1.0",
-        "orchestra/testbench": "^4.0"
+        "orchestra/testbench": "^6.0"
     },
     "autoload": {
         "psr-4": {