updating coveralls dependency

Author: Christian Blanquera

composer.json

@@ -18,7 +18,7 @@
     "require-dev": {
         "phpunit/phpunit": "7.0.2",
         "squizlabs/php_codesniffer": "3.2.3",
-        "satooshi/php-coveralls": "2.0.0"
+        "php-coveralls/php-coveralls": "~2.1.0"
     },
     "require": {
         "cradlephp/components": "~2.2.0"