Merge pull request #17 from sourceboat/dependabot/composer/orchestra/testbench-tw-5.0or-tw-6.0

Update orchestra/testbench requirement from ^5.0 to ^5.0 || ^6.0

Author: Kevin Buchholz

composer.json

@@ -34,7 +34,7 @@
     },
     "require-dev": {
         "consistence/coding-standard": "3.10.1",
-        "orchestra/testbench": "^5.0",
+        "orchestra/testbench": "^5.0 || ^6.0",
         "phpmd/phpmd": "^2.6",
         "phpunit/phpunit": "9.*",
         "slevomat/coding-standard": "6.0.8",