Maestro adds support for PHP 8.0 (#29)

Author: dantleech

composer.json

@@ -9,16 +9,16 @@
         }
     ],
     "require": {
-        "php": "^7.3",
+        "php": "^7.3 || ^8.0",
         "microsoft/tolerant-php-parser": "~0.0.1",
-        "phpactor/text-document": "^1.2.2",
+        "phpactor/text-document": "~1.2.3",
         "phpactor/worse-reflection": "~0.4.4",
         "twig/twig": "^2.4"
     },
     "require-dev": {
         "ergebnis/composer-normalize": "^2.0",
         "friendsofphp/php-cs-fixer": "^2.17",
-        "phpactor/test-utils": "^1.0",
+        "phpactor/test-utils": "~1.1.3",
         "phpstan/phpstan": "~0.12.0",
         "phpunit/phpunit": "^9.0",
         "symfony/var-dumper": "^5.0",