Update to Laravel 8

Author: alberto-rial

composer.json

@@ -21,12 +21,12 @@
     "require": {
         "php": ">=7.0",
         "ext-json": "*",
-        "illuminate/notifications": "~5.5|^6.0|^7.0",
-        "illuminate/support": "~5.5|^6.0|^7.0",
-        "illuminate/http": "~5.5|^6.0|^7.0",
-        "illuminate/routing": "~5.5|^6.0|^7.0",
-        "guzzlehttp/guzzle": "^6.2|^7.0",
-        "illuminate/events": "~5.5|^6.0|^7.0",
+        "illuminate/notifications": "~5.5|^6.0|^7.0|^8.0",
+        "illuminate/support": "~5.5|^6.0|^7.0|^8.0",
+        "illuminate/http": "~5.5|^6.0|^7.0|^8.0",
+        "illuminate/routing": "~5.5|^6.0|^7.0|^8.0",
+        "guzzlehttp/guzzle": "^6.2|^7.0|^8.0",
+        "illuminate/events": "~5.5|^6.0|^7.0|^8.0",
         "nesbot/carbon": "^2.0"
     },
     "autoload": {