fix phpcov version

Author: andrew-nuwber

composer.json

@@ -21,11 +21,11 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^8.0 || ^9.0",
+    "phpunit/phpcov": "^8.0 || ^9.0",
     "php-http/guzzle6-adapter": "^1.0",
-    "mockery/mockery": "^1.2",
+    "mockery/mockery": "^1.3",
     "nyholm/nsa": "^1.0",
     "php-coveralls/php-coveralls": "^2.4",
-    "phpunit/phpcov": "^8.0",
     "friendsofphp/php-cs-fixer": "^2.18"
   },
   "autoload": {