Merge pull request #15 from JeroenVanOort/php-8

Added compatibility with PHP 8

Author: rincler

.travis.yml

@@ -5,6 +5,8 @@ php:
   - "7.1"
   - "7.2"
   - "7.3"
+  - "7.4"
+  - "8.0"
 
 env:
   - PREFER_LOWEST=no

composer.json

@@ -5,7 +5,7 @@
     "keywords": ["enum", "phpstan"],
     "license": "MIT",
     "require": {
-        "php": "~7.1",
+        "php": "~7.1|^8.0",
         "myclabs/php-enum": "^1.2",
         "phpstan/phpstan": "^0.10|^0.11|^0.12"
     },