Merge pull request #21 from sanmai/patch-1

Allow PHP 8

Author: moufmouf

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": "^7.1",
+        "php": "^7.1 || ^8.0",
         "phpstan/phpstan": "^0.10 | ^0.11 | ^0.12",
         "thecodingmachine/safe": "^1.0"
     },