Update composer and upgrade laravel/framework to 6.20.43

Author: steinger

composer.json

@@ -5,7 +5,7 @@
     "license": "MIT",
     "type": "project",
     "require": {
-        "php": "^7.2",
+        "php": "^7.2.5|^8.0",
         "fideloper/proxy": "^4.0",
         "laravel/framework": "^6.0",
         "laravel/helpers": "^1.2",