Maestro adds support for PHP 8.0 (#6)

Author: dantleech

composer.json

@@ -9,7 +9,7 @@
         }
     ],
     "require": {
-        "php": "^7.3",
+        "php": "^7.3 || ^8.0",
         "webmozart/path-util": "^2.3"
     },
     "require-dev": {
@@ -44,4 +44,4 @@
             "vendor/bin/phpunit"
         ]
     }
-}
+}