chore(deps): update dependency php-coveralls/php-coveralls to v2.8.0

Author: renovate[bot]

composer.json

@@ -19,7 +19,7 @@
     "dms/phpunit-arraysubset-asserts": "0.5.0",
     "friendsofphp/php-cs-fixer": "*",
     "phpunit/phpunit": "9.6.23",
-    "php-coveralls/php-coveralls": "2.7.0",
+    "php-coveralls/php-coveralls": "2.8.0",
     "squizlabs/php_codesniffer": "3.10.2"
   },
   "autoload": {