Update composer: php-coveralls/php-coveralls

Author: haphan

composer.json

@@ -34,15 +34,15 @@
     },
     "require": {
         "php": "~7.0",
-        "guzzlehttp/guzzle": "~6.1",
-        "justinrainbow/json-schema": "~5.2"
+        "guzzlehttp/guzzle": "^6.1",
+        "justinrainbow/json-schema": "^5.2"
     },
     "require-dev": {
         "phpunit/phpunit": "^6.5",
         "psr/log": "^1.0",
-        "satooshi/php-coveralls": "^2.0",
+        "php-coveralls/php-coveralls": "^2.0",
         "jakub-onderka/php-parallel-lint": "^1.0",
-        "friendsofphp/php-cs-fixer": "^2.9"
+        "friendsofphp/php-cs-fixer": "^2.13"
     },
     "extra": {
         "branch-alias": {