ensure w instruct phpunit to run with debug, output coverage

Author: michaeldyrynda

.travis.yml

@@ -31,6 +31,8 @@ install: composer update --prefer-source --no-interaction --dev -v
 
 install: travis_retry composer install --prefer-dist --no-interaction --no-suggest -v
 
+script: vendor/bin/phpunit --debug -c phpunit.xml --coverage-clover=coverage.clover
+
 after_script:
     - wget https://scrutinizer-ci.com/ocular.phar
     - php ocular.phar code-coverage:upload --format=php-clover coverage.clover