Fix syntax issue in ".travis.yml" file

On the step that was sending the code coverage to Scrutinizer, there is
an issue with the syntax after some changes in the Travis
configuration [1].

[1]: 5aba4c8889

Signed-off-by: Henrique Moody <henriquemoody@gmail.com>

.travis.yml

@@ -36,7 +36,8 @@ jobs:
         - mv ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/xdebug.ini{.disabled,}
         - if [[ ! $(php -m | grep -si xdebug) ]]; then echo "xdebug required for coverage"; exit 1; fi
       script: vendor/bin/phpunit --coverage-clover ./clover.xml
-      after_script: wget https://scrutinizer-ci.com/ocular.phar
+      after_script:
+        - wget https://scrutinizer-ci.com/ocular.phar
         - php ocular.phar code-coverage:upload --format=php-clover ./clover.xml
 
     - stage: Quality assurance