Install coveralls.io client only in CI

Author: Maks3w

.travis.yml

@@ -27,6 +27,7 @@ notifications:
 before_install:
   - if [[ $EXECUTE_TEST_COVERALLS != 'true' ]]; then phpenv config-rm xdebug.ini || return 0 ; fi
   - composer self-update
+  - if [[ $EXECUTE_TEST_COVERALLS == 'true' ]]; then composer require --dev --no-update satooshi/php-coveralls ; fi
 
 install:
   - travis_retry composer install --no-interaction --ignore-platform-reqs

composer.json

@@ -39,7 +39,6 @@
         "zendframework/zend-version": "~2.4",
         "zendframework/zend-view": "~2.4",
         "fabpot/php-cs-fixer": "1.7.*",
-        "satooshi/php-coveralls": "dev-master",
         "phpunit/PHPUnit": "~4.0"
     },
     "suggest": {