added php-8 support

Author: proggeler

.gitignore

@@ -1,2 +1,3 @@
 /vendor
-.idea
+.idea
+composer.lock

.travis.yml

@@ -3,5 +3,6 @@ php:
   - '7.2'
   - '7.3'
   - '7.4'
+  - '8.0'
 install: composer install
 script: ./vendor/bin/phpunit --configuration phpunit.xml.dist

composer.json

@@ -11,7 +11,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": ">=7.2",
         "league/tactician": "^1.0",
         "symfony/validator": "^5.1"
     },
@@ -25,7 +25,7 @@
         "doctrine/cache": "Enables adding constraints using annotations"
     },
     "require-dev": {
-        "phpunit/phpunit": "^7.1",
+        "phpunit/phpunit": ">=7.2",
         "doctrine/annotations": "^1.6"
     },
     "autoload-dev": {