Upgrade PHP Coveralls

.travis.yml

@@ -86,7 +86,7 @@ jobs:
                 - if [ $COLLECT_COVERAGE == 0 ]; then vendor/bin/phpunit || travis_terminate 1; fi
                 - if [ $COLLECT_COVERAGE == 1 ]; then phpdbg -qrr vendor/bin/phpunit --coverage-clover build/logs/clover.xml || travis_terminate 1; fi
                 - PHP_CS_FIXER_FUTURE_MODE=1 php php-cs-fixer --diff --dry-run -v fix || travis_terminate 1
-                - if [ $COLLECT_COVERAGE == 1 ]; then php vendor/bin/coveralls -v; fi
+                - if [ $COLLECT_COVERAGE == 1 ]; then php vendor/bin/php-coveralls -v; fi
 
         -
             <<: *STANDARD_TEST_JOB

composer.json

@@ -35,7 +35,7 @@
         "johnkary/phpunit-speedtrap": "^1.1 || ^2.0@dev",
         "justinrainbow/json-schema": "^5.0",
         "mikey179/vfsStream": "^1.6",
-        "php-coveralls/php-coveralls": "^1.0.2",
+        "php-coveralls/php-coveralls": "^2.0",
         "php-cs-fixer/accessible-object": "^1.0",
         "phpunit/phpunit": "^5.7.23 || ^6.4.3",
         "symfony/phpunit-bridge": "^3.2.2 || ^4.0"